2.
又cos120°＝－1
2，∴C >120°，故△ABC 为钝角三角形． 答案 A
3．在△ABC 中，BC ＝2，B ＝π3，若△ABC 的面积为3
2，则tan C 为( ) A. 3 B ．1 C.33
D.32
解析 由S △ABC ＝12BC ·BA sin B ＝3
2，得BA ＝1， 由余弦定理，得
AC 2
＝AB 2
＋BC 2
－2AB ·BC cos B . ∴AC ＝3，∴AC 2
＋BA 2
＝BC 2
.
∴△ABC 为直角三角形，其中A 为直角． ∴tan C ＝AB AC ＝33. 答案 C
4．三角形的两边长为3和5，其夹角的余弦值是方程5x 2
－7x －6＝A ．6 B.152 C ．8
D ．10
解析 由5x 2－7x －6＝0，得x ＝－35，或x ＝2(舍去)．∴cos α＝－35，答案 A
5．△ABC 中，A ＝60°，b ＝16，此三角形的面积S ＝2203，则a 的值为( ) A ．7 B ．25 C ．55
D ．49
解析 由S ＝220 3，得1
2bc sin A ＝220 3. 即12×16×c ×3
2＝220 3，∴c ＝55.
∴a 2＝b 2＋c 2－2bc cos60°
＝162＋552－2×16×55×1
2＝2401. ∴a ＝49. 答案 D
6．在△ABC 中，a ，b ，c 分别是角A ，B ，C 所对的边，已知a ＝3，b ＝3，C ＝30°，则A ＝________. 解析 c 2＝a 2＋b 2－2ab cos C ＝3＋9－2×3×3×3
2＝3， ＝3·123＝12，
所对的边分别为a ，b ，c ，若(3b －c )cos A ＝a cos C ，则cos A ＝______. ， (3sin B －sin C )cos A ＝sin A cos C .
∴3sin B cos A ＝sin(A ＋C )＝sin B .∴cos A ＝33.
答案 3
3
8．在△ABC 中，a 2－b 2＋bc ·cos A －ac ·cos B ＝________.
解析 由余弦定理cos A ＝b 2＋c 2－a 22bc ，得bc ·cos A ＝12(b 2＋c 2－a 2)，同理ac ·cos B ＝12(a 2＋c 2－b 2)． ∴a 2－b 2＋bc ·cos A －ac ·cos B
＝a 2－b 2＋12(b 2＋c 2－a 2)－1
2(a 2＋c 2－b 2) ＝a 2－b 2＋b 2－a 2＝0. 答案 0
9．在△ABC 中，A ＝60°，b ＝1，c ＝4，则a ＋b ＋c
sin A ＋sin B ＋sin C 的值为________．
解析 在△ABC 中，由正弦定理得
a sin A ＝
b sin B ＝
c sin C
＝2R ，得a ＋b ＋c ＝2R (sin A ＋sin B ＋sin C )．
又a 2
＝b 2
＋c 2
－2bc cos A ＝1＋16－2×1×4×1
2＝13，
∴a ＝13，
∴a ＋b ＋c sin A ＋sin B ＋sin C ＝2R ＝a sin A ＝13sin60°＝2393. 答案
2393
10．在锐角△ABC 中，a ，b ，c 分别为角A ，B ，C 所对的边，又c ＝21，b ＝4，且BC 边上的高h ＝2 3.
(1)求角C ； (2)求边a 的长．
解 (1)由于△ABC 为锐角三角形，过A 作
AD ⊥BC 于D 点，
sin C ＝234＝3
2，则C ＝60°. (2)由余弦定理，可知 c 2＝a 2＋b 2－2ab cos C ，
则(21)2＝42＋a 2－2×4×a ×1
2，即a 2－4a －5＝0. 所以a ＝5，或a ＝－1(舍)． 因此所求角C ＝60°，边a 长为5.
11．在△ABC 中，内角A ，B ，C 对边的边长分别是a ，b ，c ，已知
(1)若△ABC 的面积等于3，求a ，b ；
(2)若sin C ＋sin(B －A )＝2sin2A ，求△ABC 的面积． 解 (1)由余弦定理及已知条件，得 a 2＋b 2－ab ＝4.
又因为△ABC 的面积等于3， 所以1
2ab sin C ＝3得ab ＝4，
联立方程组???
a 2＋
b 2
－ab ＝4，
ab ＝4，
解得a ＝2，b ＝2.
(2)由题意，得sin(B ＋A )＋sin(B －A )＝4sin A cos A ， 即sin B cos A ＝2sin A cos A . 当cos A ＝0时，A ＝π2，B ＝π
6， ∴a ＝433，b ＝233.
∴△
b ＝2
3 3. 当cos 解得???
??
a ＝233，
b ＝433.
∴△ABC 的面积S ＝12ab sin C ＝23
3.
12．△ABC 的面积是30，内角A ，B ，C 所对边长分别为a ，b ，c ，cos A ＝12
13. (1)求AB →·AC →；
(2)若c －b ＝1，求a 的值．
解 (1)在△ABC 中，∵cos A ＝1213，∴sin A ＝513. 又S △ABC ＝1
2bc sin A ＝30，∴bc ＝12×13. ∴AB →·AC →＝|AB →||AC →|cos A ＝bc cos A ＝144. (2)由(1)知bc ＝12×13，又c －b ＝1， ∴b ＝12，c ＝13.
在△ABC 中，由余弦定理，得 a 2＝b 2＋c 2－2bc cos A
＝122＋132－2×12×13×12
13＝25， ∴a ＝5.
人教新课标版语文高一人教版必修三双基限时练 12动物游戏之谜
双基限时练(十二)动物游戏之谜 一、基础测试 1．下列词语中，加点字的注音完全正确的一项是() A．缅．甸(miàn)聒．噪(ɡuō) 潜．游(qián) 嬉．闹(xī) B．脊．背(jǐ) 挨．挤(ái) 倒．立(dào) 消耗．(hào) C．汲．取(jí) 安抚．(fǔ) 尾鳍．(qí) 格．斗(ɡé) D．反馈．(kuì) 模．式(mó) 捉．摸(zuó) 嚼．烂(jiáo) 解析A．缅miǎn；B.挨āi；D.捉zhuō。 答案 C 2．下列词语中，没有错别字的一项是() A．伙伴兴高彩烈平衡史无前例 B．默契得意扬扬厮打销声匿迹 C．跳越猩猩相惜消融铁打金刚 D．元气自娱自乐调剂杂草老藤 解析A．兴高彩．烈—采；B.得意扬扬 ．．—洋洋；C.跳越．—跃，猩猩 ．．相惜—惺惺。 答案 D 3．下列加点的成语使用不正确的一项是() A．在动物身上，无论从形态结构、生理过程，还是行为方面去分析，尽可能节省能量 的例子几乎俯拾皆是 ．．．．。 B．单独游戏时，动物常常兴高采烈 ．．．．地独自奔跑、跳跃，在原地打圈子。 C．每当刮起大风时，成群的露脊鲸把尾鳍高高举出水面，正对着大风，以便像船帆似 的，让大风推着它们，得意洋洋 ．．．．地“驶”向海岸。 D．研究者们各执己见，众说纷纭 ．．．．。 解析A项中应是“比比皆是”。“比比皆是”和“俯拾皆是”都表示相同的事物很多，到处都是。前者侧重表示多得很，到处都是；后者侧重表示容易得到。 答案 A 4．下列各句没有语病的一句是() A．动物的游戏行为，是动物行为研究中被认为最复杂、最难以捉摸、引起争论最多的
行为。 B．在动物身上，无论从形态结构、生理过程和行为方面去分析，尽可能节省能量的例子比比皆是。 C．地震发生后，当地政府及解放军部队全力救助，目前灾区群众已住进了临时帐篷，防止余震再次发生。 D．有人认为科学家终日埋头科研，不问家事，有点不近人情，然而事实却是对这种偏见的最好说明。 解析B项中应将“和”改为“还是”；C项不合逻辑，应为“预防余震发生”；D项中“事实是说明”正好说反了，依句意应是“事实正是对上述说法的反驳”。 答案 A 5．下列句子中标点符号的使用，不正确的一项是() A．马驹常常欢快地连续扬起前蹄，轻盈地蹦跳；猴类喜欢在地上翻滚，拉着树枝荡秋千……单独游戏时动物显得自由自在。 B．这些科学家认为，动物游戏是为了“自我娱乐”，而自我娱乐是动物天性的表现，正像捕食、逃避敌害，繁殖行为等是动物的天性一样。 C．这几种假说，哪一种更有道理？动物的游戏，究竟是为了“演习”，为了“自娱”，为了“学习”，还是为了“锻炼”？研究者们各执己见，众说纷纭。 D．电视剧《水浒传》标明作者为施耐庵、罗贯中，引起许多观众的疑惑：《水浒传》的作者不是施耐庵吗？怎么又多出个罗贯中？ 解析B项中，第二个“自我娱乐”也应加引号，“逃避敌害”后的逗号应改为顿号，因为三者处在同一等级的并列上。 答案 B 6．下列语句排列正确的一项是() ①否则，我就只能相信，这些曲调是真正的音乐。 ②那些歌也许是有关航行，或有关浮游节肢动物的来源，或有关领地界限的简单而实打实的叙述和声明。 ③当然还有其他方法来解释鲸鱼之歌。 ④除非有一天有人证明，这些长长的、缭绕的、执著的曲调，被不同的歌唱者重复着，又加上了它们各自的修饰，这不过是为了向海面下数百英里之外传递像“鲸鱼在这儿”之类寻常的信息。 ⑤但迄今证据还没有得到。 A．③①②⑤④B．②③①④⑤ C．⑤②③①④D．③②⑤④① 解析注意“否则”“除非”“但”等词。
双基限时练26
双基限时练(二十六) 1．已知下列四个等式： ①sin(α＋β)＝sin αcos β＋cos αsin β； ②cos(α＋β)＝cos αcos β－sin αsin β； ③cos ? ?? ??π2＋α＝－sin α； ④tan(α－β)＝tan α－tan β1＋tan αtan β . 其中恒成立的等式有( ) A ．2个 B ．3个 C ．4个 D ．5个 解析 ①，②，③对任意角α，β恒成立，④中的α，β还要使正 切函数有意义． 答案 B 2.1－tan15°1＋tan15° 的值为( ) A. 3 B.33 C ．1 D ．－ 3 解析 原式＝tan45°－tan15°1＋tan45°tan15° ＝tan(45°－15°)＝tan30°＝33. 答案 B 3．设tan(α＋β)＝25，tan ? ????β－π4＝14，则tan ? ?? ??α＋π4等于( ) A.1328 B.1322 C.322 D.16 3．已知α，β为锐角，cos α＝45，tan(α－β)＝－13，则tan β的值为 ( )
A.13 B.139 C.1315 D.59 答案 B 4．已知tan α＋tan β＝2，tan(α＋β)＝4，则tan αtan β等于( ) A ．2 B ．1 C.12 D ．4 解析 因为tan(α＋β)＝tan α＋tan β 1－tan αtan β＝21－tan αtan β ＝4，所以tan αtan β＝12. 答案 C 5．若0<α<π2，0<β<π2，且tan α＝17，tan β＝34，则α＋β等于( ) A.π6 B.π4 C.π3 D.3π4 解析 由已知可求得tan(α＋β)＝1. 又0<α＋β<π，∴α＋β＝π4. 答案 B 6．已知tan α和tan ? ????π4－α是方程ax 2＋bx ＋c ＝0的两个根，则a ，b ，c 的关系是( ) A ．b ＝a ＋c B ．2b ＝a ＋c C ．c ＝b ＋a D ．c ＝ab 解析 由韦达定理可知tan α＋tan ? ????π4－α＝－b a 且tan αtan ? ?? ??π4－a ＝
高二数学 双基限时练3
双基限时练(三) 1．设f ′(x 0)＝0，则曲线y ＝f (x )在点(x 0，f (x 0))处的切线( ) A ．不存在 B ．与x 轴垂直 C ．与x 轴平行 D ．与x 轴平行或重合 答案 D 2．一木块沿某一斜面自由下滑，测得下滑的水平距离s 与时间t 之间的函数关系为s ＝18t 2，则当t ＝2时，此木块在水平方向的瞬时速 度为( ) A. 2 B. 1 C.12 D .14 解析 s ′＝lim Δt →0 Δs Δt ＝lim Δt →0 18(t ＋Δt )2－18t 2Δt ＝lim Δt →0 14tΔt ＋18(Δt )2Δt ＝lim Δt →0 (14t ＋18Δt )＝14t . ∴当t ＝2时，s ′＝12. 答案 C 3．若曲线y ＝h (x )在点P (a ，h (a ))处切线方程为2x ＋y ＋1＝0，则 ( ) A ．h ′(a )<0 B ．h ′(a )>0 C ．h ′(a )＝0 D ．h ′(a )的符号不定 解析 由2x ＋y ＋1＝0，得h ′(a )＝－2<0. ∴h ′(a )<0. 答案 A
4．曲线y ＝9x 在点(3,3)处的切线方程的倾斜角α等于( ) A ．45° B ．60° C ．135° D ．120° 解析 k ＝y ′＝lim Δx →0 Δy Δx ＝lim Δx →0 9x ＋Δx －9x Δx ＝lim Δx →0 －9x (x ＋Δx )＝－9x 2. ∴当x ＝3时，tan α＝－1.∴α＝135°. 答案 C 5．在曲线y ＝x 2 上切线倾斜角为π4的点是( ) A ．(0,0) B ．(2,4) C ．(14，116) D ．(12，14) 解析 y ′＝lim Δx →0 Δy Δx ＝lim Δx →0 (x ＋Δx )2－x 2Δx ＝lim Δx →0 2xΔx ＋(Δx )2Δx ＝lim Δx →0 (2x ＋Δx )＝2x . 令2x ＝tan π4＝1，∴x ＝12，y ＝14. 故所求的点是(12，14)． 答案 D 6．已知曲线y ＝2x 2上一点A (2,8)，则过点A 的切线的斜率为________． 解析 k ＝f ′(2)＝lim Δx →0 2(2＋Δx )2－2×22Δx
2019-2020年高中数学 双基限时练12 新人教A版必修3
2019-2020年高中数学双基限时练12 新人教A版必修3 1．问题：①有1000个乒乓球分别装在3个箱子内，其中红色箱子内有500个，蓝色箱子内有200个，黄色箱子内有300个，现从中抽取一个容量为100的样本；②从20名学生中选出3名参加座谈会． 方法：Ⅰ.简单随机抽样法Ⅱ.系统抽样法Ⅲ.分层抽样法．其中问题与方法能配对的是( ) A．①Ⅰ，②ⅡB．①Ⅲ，②Ⅰ C．①Ⅱ，②ⅢD．①Ⅲ，②Ⅱ 解析读题知①用分层抽样法，②用简单随机抽样法． 答案 B 2．一个单位有职工160人，其中有业务员104人，管理人员32人，后勤服务人员24人，要从中抽取一个容量为20的样本，用分层抽样方法抽出样本，则在20人的样本中管理人员人数为( ) A．3 B．4 C．12 D．7 解析由题意可得20 160 ×32＝4. 答案 B 3．某地区为了解居民家庭生活状况，先把居民按所在行业分为几类，然后每个行业抽1 100的居民家庭进行调查，这种抽样是( ) A．简单随机抽样B．系统抽样 C．分层抽样D．分类抽样 答案 C 4．一个总体分为A，B两层，其个体数之比为，用分层抽样方法从总体中抽取一个容量为10的样本，则A层中抽取的样本个数为( ) A．8 B．6 C．4 D．2 答案 A 5．某大学数学系共有本科生5000人，其中一、二、三、四年级的学生数之比为4:3:2:1.要用分层抽样的方法从所有本科生中抽取一个容量为200的样本，则应抽三年级的学生( ) A．80人B．40人 C．60人D．20人
解析 分层抽样应按比例抽取，所以应抽取三年级的学生人数为200×2 10＝40. 答案 B 6．一个单位共有职工200人，其中不超过45岁的有120人，超过45岁的有80人．为了调查职工的健康状况，用分层抽样的方法从全体职工中抽取一个容量为25的样本，应抽取超过45岁的职工________人． 解析 依题意得，抽取超过45岁的职工人数为25 200×80＝10. 答案 10 7．某工厂生产A ，B ，C 三种不同型号的产品，产品数量之比依次为 现用分层 抽样方法抽出一个容量为n 的样本，样本中A 种型号产品有16件，那么此样本的容量n ＝________. 解析 由题意得n ＝16×10 2＝80. 答案 80 8．课题组进行城市空气质量调查，按地域把24个城市分成甲、乙、丙三组，对应城市数分别为4,12,8.若用分层抽样抽取6个城市，则丙组中应抽取的城市数为________． 答案 2 9．某企业有三个车间，第一车间有x 人，第二车间有300人，第三车间有y 人，采用分层抽样的方法抽取一个容量为45人的样本，第一车间被抽取20人，第三车间被抽取10人，问：这个企业第一车间、第三车间各有多少人？ 解 x ＝20×30045－20－10＝400(人)，y ＝10×300 45－20－10 ＝200(人)． 10．某单位有工程师6 人，技术员12 人，技工18 人，要从这些人中抽取一个容量为 n 的样本．如果采用系统抽样和分层抽样方法抽取，都不用剔除个体；如果样本容量增加1 个，则在采用系统抽样时，需要在总体中先剔除1个个体，求样本容量n . 解 解法1：总体容量为6＋12＋18＝36(人)．当样本容量是n 时，由题意知，系统抽样的间隔为36n ，分层抽样的比例是n 36，抽取工程师人数为n 36×6＝n 6人，技术人员人数为n 36×12 ＝n 3人，技工人数为n 36×18＝n 2 人，所以n 应是6的倍数，36的约数，即n ＝6,12,18. 当样本容量为(n ＋1)时，总体容量是35 人，系统抽样的间隔为35n ＋1，因为35 n ＋1 必须是整数，所以n 只能取6，即样本容量n ＝6. 解法2：总体容量为6＋12＋18＝36(人)． 当抽取n 个个体时，不论是系统抽样还是分层抽样，都不用剔除个体，所以n 应为
2016高中数学人教B版必修3双基限时练12
双基限时练（十二） 用样本的频率分布估计总体的分布 基础强化 1、下列关于频率分布直方图的说法，正确的就是（） A、直方图的高表示取某数的频率 B、直方图的高表示该组上的个体在样本中出现频数与组距的比值 C、直方图的高表示该组上的个体在样本中出现的频率 D、直方图的高表示该组上的个体在样本中出现频率与组距的比值 解析频率分布直方图的纵坐标表示错误！，故选D、 答案D 2、从一群学生中抽取一个一定容量的样本对她们的学习成绩进 行分析，前三组就是不超过80分的人，其频数之与为20人，其频率之与（又称累积频率）为0、4,则所抽取的样本的容量就是（） A、100 B、80 C、40 D、50 解析样本容量为亠 = 50、故选D、 0、4 答案D 3、下列说法不正确的就是（） A、频率分布直方图中每个小矩形的高就就是该组的频率 B、频率分布直方图中各个小矩形的面积之与等于1
C、频率分布直方图中各个小矩形的宽一样大 D、频率分布折线图就是依次连接频率分布直方图的每个小矩形 上端中点得到的 解析在频率分布直方图中各个小矩形的高就就是该组的错误!、 答案A 4、某市教育行政部门为了对2012届高中毕业生的学生水平进行评价，从该市高中毕业生中抽取1000名学生的数学成绩作为样木进行统计，其频率分布直方图如图所示、则这1000名学生的数学平均成绩的最大可能值为（） 频率 O 40 50 60 70 80 90 100分数（分） A、67、50 B、72、05 C、76、50 D、77、50 解析由题意得平均成绩的最大可能值为0、05X50 + 0、1X60 + 0、25X70 + 0、35X80 + 0、15X90 + 0、1X100 = 77、50、 答案D 5、一个社会调查机构就某地居民的月收入调查了10000人，并根据所得数据画了样本的频率分布直方图（如下图）、为了分析居民的收入与年龄、学历、职业等方而的关系,要从这10000人中再用分?层抽样方法抽出100人作进一步调查，则在［2500, 3000）（元）月收入段应
【精品】人教版高中英语必修四：双基限时练【1】(含答案解析)
人教版英语精品资料 双基限时练(一)Unit 1Part ⅠⅠ.单词拼写 1．Any ________ (组织) that received money from the US government had to treat blacks equally. 答案organization 2．How long will the ________ (接通；连接) of the telephone take? 答案connection 3．Their ________ (举止) towards me shows that they don't like me. 答案behaviour 4．I was ________ (鼓舞) to work harder than ever before by what my teacher had said. 答案inspired 5．I doubt if it is ________ (值得) for you to read that book. 答案worthwhile 6．She ________ (支持) her husband on the money she earns from teaching. 答案supports 7．An eye ________ (专家) checked her eyes carefully and advised her not to use her eyes too much. 答案specialist 8．Jane spent many years ________ (观察) and recording their daily activities. 答案observing
高中数学双基限时练21
双基限时练(二十一) 1．已知a ＝(－3,4)，b ＝(5,2)，则a ·b ＝( ) A ．23 B ．7 C ．－23 D ．－7 解析 a ·b ＝－3×5＋4×2＝－7，故选D. 答案 D 2．已知向量a ＝(1，－1)，b ＝(2，x )．若a·b ＝1，则x ＝( ) A ．－1 B ．－12 C.12 D ．1 解析 由a ＝(1，－1)，b ＝(2，x )可得a·b ＝2－x ＝1，故x ＝1. 答案 D 3．若非零向量a ，b ，满足|a |＝|b |，(2a ＋b )·b ＝0，则a 与b 的夹角为( ) A ．30° B ．60° C ．120° D ．150° 答案 C 4．已知A ，B ，C 是坐标平面上的三点，其坐标分别为A (1,2)，B (4,1)，C (0，－1)，则△ABC 的形状为( ) A ．直角三角形 B ．等腰三角形 C ．等腰直角三角形 D ．以上均不正确 解析 AB →＝(3，－1)，AC →＝(－1，－3)，BC → ＝(－4，－2)， ∴|AB →|＝10，|AC →|＝10，|BC → |＝20.
∴|AB →|＝|AC →|，且|AB →|2＋|AC →|2 ＝|BC → |2＝20. ∴△ABC 为等腰直角三角形，应选C. 答案 C 5．已知a ＝(0,1)，b ＝(33，x )，向量a 与b 的夹角为π 3，则x 的值为( ) A ．±3 B ．±3 C ．±9 D ．3 解析 cos π3＝a ·b |a |·|b |＝x 27＋x 2， ∴2x ＝27＋x 2，且x >0，∴3x 2＝27，∴x ＝3. 答案 D 6．已知向量a ＝(1,2)，b ＝(2，－3)，若向量c 满足(c ＋a )∥b ，c ⊥(a ＋b )，则c ＝( ) A.? ????79，73 B.? ????－7 3，－79 C.? ?? ??73，79 D.? ?? ??－7 9，－73 解析 不妨设c ＝(m ，n )，则a ＋c ＝(1＋m,2＋n )，a ＋b ＝(3，－1)， 对于(c ＋a )∥b ，则有－3(1＋m )＝2(2＋n )． 又c ⊥(a ＋b )，则有3m －n ＝0， ∴m ＝－79，n ＝－7 3. 答案 D 7．已知向量a ＝(3,1)，b ＝(1,3)，c ＝(k,2)，若(a －c )⊥b ，则k ＝________.
高二数学 双基限时练12
双基限时练(十二) 1．下列各式中，正确的是( ) A .??a b F ′(x )d x ＝F ′(b )－F ′(a ) B.??a b F ′(x)d x ＝F ′(a)－F ′(b) C .??a b F ′(x )d x ＝F (b )－F (a ) D.??a b F ′(x)d x ＝F(a)－F(b) 答案 C 2．∫π 20( sin x －cos x)d x ＝( ) A ．0 B ．1 C ．2 D .π 2 解析 ∫π 20(sin x －cos x)d x ＝∫π20sin x d x －∫π 20cos x d x ＝(－cos x) ??? π20－(sin x) ??? π20 ＝1－1＝0. 答案 A 3．若∫a 1(2x ＋1 x )d x ＝3＋ln 2(a>1)，则a 的值为( ) A ．6 B ．4 C ．3 D ．2 解析 ∵??1 a (2x ＋1 x )d x
＝(x 2 ＋ln x) ? ?? a 1＝a 2＋ln a －1， 又?? 1 a (2x ＋ 1 x )d x ＝3＋ln 2， ∴a ＝2. 答案 D 4.? ?π－πcos x d x 等于( ) A ．2π B ．π C ．0 D ．1 解析 ? ?π－πcos x d x ＝sin x ? ?? π－π＝sinπ－sin (－π)＝0. 答案 C 5．设f(x)＝????? x 2 (0≤x<1)， 2－x (1外研版高中英语必修二双基限时练10
双基限时练(十)Module 4Section ⅠⅠ.单词拼写 1. The country ____________ (景色) was so attractive that they were reluctant to leave. 答案scene 2. Her style of painting has been ____________ (模仿) by other artists. 答案imitated 3. She refuses to face ____________ (现实)． 答案reality 4. We have no ____________ (当代的) account of the battle. 答案contemporary 5. We had a ____________ (令人愉快的) time by the seashore last Sunday. 答案delightful 6. This book aims to cover all ____________(方面) of city life. 答案aspects 7．There are many ________ (稀有) animals in the zoo. 答案unusual 8．The school has ________ (采用) a new teaching method. 答案adopted 9．It's ________ (传统的) to eat turkey (火鸡) at the Thanksgiving Day. 答案traditional 10．We are living a ________ (多彩的) life. 答案colourful
【精校版】人教版高中英语必修四：双基限时练【12】(含答案解析)
人教版精品英语资料（精校版） 双基限时练(十二)Unit 4Part ⅢⅠ.单词拼写 1．Some English adverbs can perform a ________ (作用) as adjectives. 答案function 2．The cheat gave a ________ (假的) name and address. 答案false 3．I was filled with ________ (愤怒) when I saw him kicking the dog. 答案anger 4．In my opinion, his article is far too ________ (主观)． 答案subjective 5．Faced with danger, the mother ________ (拥抱) her son tightly. 答案hugged Ⅱ.单句语法填空(不多于3个单词) 1．Mother handed her a cup of coffee to put her at ________(easy)． 答案ease 2．All of us are ________(will) to help you to get out of the trouble. 答案willing 3．I find it ________(amaze) that you can't swim. 答案amazing 4．Just out of ________(curious), how old are you? 答案curiosity
5．In English study we should know the importance of practicing ________(speak) English. 答案spoken 6．The minister gave ________(express) to his anger in an attack on the government last night. 答案expression 7．What happens if the two warring parties fail to reach an ________(agree)? 答案agreement 8．In the world people show respect for people by using different ________ (gesture)． 答案gestures 9．He stood ________(closely) to you and had something to tell you. 答案close 10．He was ________(punishment) for his killing innocent people. 答案punished Ⅲ.根据课文内容，完成语法填空 Body language is one of the most powerful means of communication, often even more powerful __1__ spoken language. People around the world show all kinds of feelings, wishes and attitudes __2__ they might never speak out. The most universal facial expression is the smile, __3__ function is to show happiness and put people __4__ ease. Smiles do not always mean happiness. There are __5__(happy) smiles, for example, when someone loses face he may smile to hide the embarrassment. However, the general purpose of smiling is __6__(show) good feelings.
高中英语人教版必修3双基限时练1
双基限时练(一)Unit 1Part ⅠⅠ.单词拼写 1．He traveled around the country ________ (搜集) facts about folk songs. 答案gathering 2．Do you know when India gained ________ (独立) from Britain? 答案independence 3．I really ________ (钦佩) the way she brings up those kids on her own. 答案admire 4．It's difficult to get used to another country's ________ (风俗)．答案customs 5．It is my ________ (信仰) that we will find a cure for cancer sooner or later. 答案belief 6．Many English words have Latin ________ (起源)． 答案origins 7．These two countries had three ________ (宗教上的) wars in twenty years. 答案religious 8．People in this town ________ (挨饿); several buildings were bombed and crime soared (剧增) because you have to steal to eat. 答案starved 9．Medals were ________ (授予) to the best speakers on the debating team.
北师大版高中英语必修四双基限时练12
高中英语学习材料 madeofjingetieji 双基限时练(十二)Unit 11Lesson 3 Ⅰ.单词拼写 1．I'll just ________ (缝) the button on, and the coat will be as good as new. 答案sew 2．This kind of books are not ________ (合适的) for children. 答案suitable 3．He presented a new ________ (概念) of the beginning of the universe. 答案concept 4．This building is one of the ________ (传统的) designs of last century. 答案classic 5．A ________ (公司) is a large business or company. 答案corporation 6．More and more factories and companies want to ________ (广告) their products on CCTV. 答案advertise 7．If you have a tight ________ (预算), I advise you not to travel abroad for the moment. 答案budget 8．I will show you a photo of my ________ (侄儿) if you want to take a look at him first.
高中英语 双基限时练3 新人教版必修1
双基限时练(三) Unit 1 Part Ⅲ Ⅰ.单词拼写 1．________(少年) in some schools are driven to work hard at their lessons. 答案Teenagers 2．That's ________ (确切地) what I wanted. 答案exactly 3．We are ________ (感激的) to your help. 答案grateful 4．In the past, we used to ________ (交换) letters. 答案swap 5．I heard a(n) ________ (条) of news over the radio. 答案item Ⅱ.选词填空 get along/on well with， join sb. in， get/be tired of， fall in love with 答案getting along/on well with 2．I'll live in Shanghai, because I went to Shanghai last year and ________ it. 答案fell in love with 3．Would you like to ________ playing football? 答案join us in 4．The st udents ________ being asked so many questions at a time. 答案get/are tired of Ⅲ.完成句子 1．I soon ________ ________ ________ ________ ________ the problem. 不久，我就发现难以解决这个问题。 答案found it difficult to settle 2．I am glad to hear that you ________ ________ ________ an operation. 很高兴，听说你手术已康复。 答案have recovered from 3．We ________ ________ ________ her when we were doi ng shopping in the mall. 我们在商场购物时碰巧遇见了她。 答案happened to meet 4．You must understand that it is no pleasure ________ ________ ________ ________. 你必须理解，遭受这样的痛苦是件不愉快的事情。 答案sufferi ng from such pain 5．It was in New Zealand ________ ________ ________ ________ for the first time. 我是在新西兰第一次遇见他的。
人教版高中英语必修三双基限时练4
双基限时练(四)Unit 2Part ⅠⅠ.用所给词的适当形式填空 1．The boy shows great ________ (curious) about animals. 答案curiosity 2．The shopping mall is full of ________ (customer) every day. 答案customers 3．They love ________ (roast) meat in the open air. 答案roasting 4．A ________ (balance) diet is necessary for good health. 答案balanced 5．You must know your own strengths and ________ (weak)． 答案weaknesses 6．After the tiring trip, his ________ (strong) gave out. 答案strength 7．He is a liar. That is, he is always telling ________ (lie)． 答案lies 8．The ________ (host) made her guests comfortable. 答案hostess 9．I don't know how he managed to get away with ________ (steal) the bike. 答案stealing 10．— What do you think of the boy's painting? — I've never seen a person with a ________ (good) sense of art. 答案better 11．You should understand the traffic rule by now. Y ou've had it ________ (explain) often enough. 答案explained Ⅱ.用适当的介词、副词填空 1．Y ou should eat a healthy diet and exercise more to get yourself
(新课标)高中英语 双基限时练12 人教版必修1(精修版)
人教版英语精品资料（精修版） 双基限时练(十二) Unit 4 Part ⅢⅠ.单词拼写 1．His views have been ________ (表达) in numerous speeches. 答案expressed 2．I can't ________ (判断) whether he is right or wrong. 答案judge 3．Give Marie my ________ (祝贺) and tell her I'll come soon. 答案congratulations 4．I ________ (真诚地) hope I'll see her again. 答案sincerely 5．You should draw up a plan or ________ (大纲) for the essay. 答案outline Ⅱ.单句语法填空 1．People were ________ (shock) by the eruption of the volcano, for it was even greater than they had expected. 答案shocked 2．He was dead and ________ (bury) at the top of the hill. 答案buried 3．The child was ________ (frighten) by the ghost story. 答案frightened 4．An old Roman vase was ________ (dig) up here last month. 答案dug 5．It made the headlines in the ________ (nation) newspapers. 答案national 6．________ (judge) by what eve ryone says about him, he has a good chance of winning. 答案Judging 7．Luckily, the traffic accident didn't do much damage ________ either of the cars. 答案to 8．— Can you introduce yourself to others in English? — Sorry. I can't express ________ (me) in English. Chinese, OK? 答案myself 9．He is ________ of his daughter, which makes his daughter become too ________ of herself and finally this ________ ruined her. (proud) 答案proud; proud; pride 10．He ________ his thanks to us, with a thankful ________ on his face. (express)
【名师一号】高中英语 Learning to learn双基限时练
【名师一号】2014-2015学年高中英语 Learning to learn双 基限时练 Ⅰ.单词拼写 1．After three years of studying English in America, Mary can speak the language ________ (流利地)． 答案fluently 2．The Roman Empire ________ (存在) for several centuries. 答案existed 3．There are 1.3 ________ (十亿) people in China. 答案billion 4．My job lacks ________ (多样性); I'm doing the same thing all the time. 答案variety 5．We all ________ (鞠躬) to the Queen as she came out. 答案bowed 6．Her parents gave her so much money that she's got no ________ (动力) to get a job. 答案motivation 7．Although he had failed many times, he refused to admit ________ (击败)．答案defeat 8．A high ________ (百分比) of the female staff are part-time workers. 答案percentage 9．When we are on holiday in Greece, we live like the ________ (本地人)．答案natives 10．Even a small success gives you a sense of ________ (成就)． 答案achievement Ⅱ.单句语法填空(不多于3个单词) 1．Success lies in hard work. The ________ (hard) you work, the ________ (great) progress you will make. 答案与解析harder; greater 考查了the＋比较级．..the＋比较级结构，意为“越……越……”。 2．A group of ________ (policeman) on horseback attracted a lot of ________ (passer-by)． 答案与解析policemen；passers-by 考查了policewoman和passer-by的复数。
北师大版高中英语必修二双基限时练12
高中英语学习材料 （灿若寒星*制作整理） 双基限时练(十二)Unit 5Lesson 3 Ⅰ.单词拼写 1．I'd like to ________ (辞职) my job because it's too hard for me. 答案quit 2．A famous ________ (音乐家) will perform in my city theatre tomorrow evening. 答案musician 3．His sister is such a ________ (美人) that many young men want to marry her. 答案beauty 4．He still hasn't found his own ________ (才能) in painting. 答案talent 5．Your ________ (发型) is not allowed in our school. 答案hairstyle 6．She enjoys playing the piano and hopes to be a ________ (钢琴家) when she grows up. 答案pianist 7．Mr. Smith has ________ (剃) all of his moustache and looks more handsome. 答案shaved 8．Plants get their supplies of food from the ground through their ________ (根)．
答案roots 9．The business card is your ________ (身份), you must have one at all times. 答案identity 10．We can't judge a person only by his or her ________ (外貌)．答案appearance Ⅱ.同义句转换 1．The little girl surprised the audience by performing a short play in English. →The little girl ________ the audience ________ by performing a short play in English. 答案made; surprised 2．He got too nervous to express himself clearly. →He got ________ nervous ________ he could not express himself clearly. 答案so; that 3．The bus arrived very late because the weather was bad. →The bus arrived very late ________ ________ the bad weather. 答案because of 4．Because of the terrible flood, farmers had a poor harvest that year. →________ ________ ________ ________ the terrible flood, farmers had a poor harvest that year. 答案As a result of 5．When he was only ten years old, the boy began to earn his living by selling newspapers.
