1.as soon as　 一……就 　He called me up as soon as he came back to Beijing. 　Please call me as soon as you finish your homework. 　2.not as/so ……as 和……一樣；不如 　I think English is as important as maths 　For me, basketball is as interesting as football. 　3.as……as possible 盡可能的 　Kids in the West usually get ready for as many gifts as possible. 　We should speak English as much as we can in class. 　4.be afraid of doing sth./that 害怕做某事、害怕?lián)��?　Children are always afraid of the dark. 　I used to be afraid of the dark. However, I am not now. 　5.be busy doing 忙于做某事 　Mom is always busy cooking when I get home. 　People in Beijing are busy getting ready for the Olympic Games. 　6.be famous /late/ready/sorry for… 以……著名 　He hurried to school yesterday, but he was late for class. 　Look!The students are getting ready for the sports meeting. 　7.both…and　 兩者都 　Students like both palying basketball and playing soccer. 　It's a good way to make both teachers and students happy. 　8.buy/give/show/send/pass/bring/lend/tell sb. sth. 為某人買某物 　If I were you, I'd give the money to charity. 　Yesterday Mary's mother bought her a new bike. 　9.give/show/bring/lend/send/pass/tell sth to sb. 把…給某人 　Please give this book to him. 　When you get to your home, please send this letter to your pen pal. 　10.either…or 要么…要么 　We can't allow him to stay at home, or he will either watch TV or play games. 　We're going to the park this Saturday, either by bus or by bike. 　11.enjoy/hate/finish/mind/keep/go on doing 喜歡做某事 　I kept him reading the text so that he could recite it quickly. 　Would you please keep holding the picture for me? 　12.get+比較級 變得越來越…… 　The weather is getting warmer and warmer. 　How do you feel now? Unfortuately, it's getting worse. 　14.get on with 與…相處 　It's hard to get on with a bad-tempered person. 　15.get ready for/ get sth. ready 為……作準備 　Look! The students are getting ready for the sports meeting. 　The next station is Dongdan. Please get ready for your arrival. 　16.had better (not) do　 最好做、不做 　You'd better help your parents do some housework once a week. 　You'd better not spend more time on this kind of game. 　17.help sb(to)do/help sb. with 　The boy helped the old man to carry a bunch of wood up the hills. 　He asked me to help him to solve the problem. 　18.don't think that　 認為…不 　I don't think that they will give up the chance of being volunteers. 　I don't think that he is reading now. 　19.I would like to.../ would you like to...?我想做 　Would you like to lend me your bike? 　Iwould like to look up some new words in it. 　20.It takes sb sometime to do sth. 花費某人...時間做某事 　It will take the workers two years to build the bridge. 　It took her 3 months to do this experiment. 　How long will it take the workers to rebuild the new school?

28．(上海6)函數(shù)的最小值是_____________________ .

答案

27．(湖南3)將函數(shù)的圖象向左平移的單位后，得到函數(shù)的圖象，則等于(　　 )

A．　 　　　　　　B．　　　　 C. 　　　　　　D.

答案D　 　，，，因為，所以等于

26．(海南14)已知函數(shù)(>0, )的圖像如圖所示，則　 =________________　

答案

25．(四川17)在中，為銳角，角所對應的邊分別為，且

(I)求的值；

(II)若，求的值。

[解析](I)∵為銳角，

∴

∵

∴ 　　　　…………………………………………6分

(II)由(I)知，∴

　由得

，即

又∵　

∴　 　　∴　

∴　 　　　…………………………………………12分

24．(四川4)已知函數(shù)，下面結論錯誤的是　 　　　

A.函數(shù)的最小正周期為　　　　 B.函數(shù)在區(qū)間上是增函數(shù)

C.函數(shù)的圖像關于直線對稱　 D.函數(shù)是奇函數(shù)

[答案]D

[解析]∵，∴A、B、C均正確，故錯誤的是D

[易錯提醒]利用誘導公式時，出現(xiàn)符號錯誤。

23．(天津17)在⊿ABC中，BC=，AC=3，sinC=2sinA　 　

(I) 求AB的值：　 　

(II) 求sin的值

本小題主要考查正弦定理、余弦定理、同角三角函數(shù)的基本關系、二倍角的正弦與余弦、兩角差的正弦等基礎知識，考查基本運算能力。滿分12分。

(Ⅰ)解：在△ABC中，根據(jù)正弦定理，

于是AB=

(Ⅱ)解：在△ABC中，根據(jù)余弦定理，得cosA=

于是　 sinA=

　　 從而sin2A=2sinAcosA=,cos2A=cos²A-sin²A=

　　 所以　 sin(2A-)=sin2Acos-cos2Asin=

22．(天津7)已知函數(shù)的最小正周期為，為了得到函數(shù)的圖象，只要將的圖象

A 向左平移個單位長度　　　 B 向右平移個單位長度

C 向左平移個單位長度　　　 D 向右平移個單位長度　 　

答案：A 　由于，則，，又

，故，向左平移個單位長度

21．(陜西17)

　 已知函數(shù)(其中)的圖象與x軸的交點中，相鄰兩個交點之間的距離為，且圖象上一個最低點為.

(Ⅰ)求的解析式；(Ⅱ)當，求的值域

20．(陜西5)若,則　　　 的值為　 　

(A)　　　　　 (B)　　　　　　 (C)　　　　 (D)