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6.During the three years of school life, our class ___ to be a good team group.

A. was proved   B. is proving   C. has been proved   D. proved

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5.The students are used to taking part in the ___ run every morning in our school.

A. 800 metres length           B.800-metres-long 

C.800 metre length            D. 800-metre-long

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4.      is important in people’s daily life.

A. Water                  B. The water

C. Waters                 D. A kind of water

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3.You ___ have told him the bad news, which made things even worse.

A. needn’t   B. oughtn’t to    C. couldn’t   D. wouldn’t

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2.-Shall I give you a ride as you live so far away?

-Thank you.      .

A. If you like                   B. Of course you can

C. It couldn’t be better            D. It’s up to you

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第一節(jié)    語(yǔ)法和詞匯知識(shí)(共20小題;每小題1.5分,滿(mǎn)分30分)

1.Hangzhou is ___ most beautiful city, where you can see ___ famous West Lake.

A. a; the    B. a; /    C. the; a    D. /; the

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22.(本題滿(mǎn)分15分)

  圍建一個(gè)面積為360m2的矩形場(chǎng)地,要求矩形場(chǎng)地的一面利用舊墻(利用舊墻需維修),其它三面圍墻要新建,在舊墻的對(duì)面的新墻上要留一個(gè)寬度為2m的進(jìn)出口,如圖所示,已知舊墻的維修費(fèi)用為45元/m,新墻的造價(jià)為180元/m,設(shè)利用的舊墻的長(zhǎng)度為x m,圍墻的總費(fèi)用為y元

(Ⅰ)將y表示為x的函數(shù):  

(Ⅱ)試確定x,使修建此矩形場(chǎng)地圍墻的總費(fèi)用最小,并求出最小總費(fèi)用。

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21.(本題14分)在銳角三角形中,邊a、b是方程x2-2x+2=0的兩根,角A、B滿(mǎn)足:

2sin(A+B)-=0,求角C的度數(shù),邊c的長(zhǎng)度及△ABC的面積。

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20.(本題滿(mǎn)分14分)

求證:

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19.(本題滿(mǎn)分14分)

    已知:函數(shù)

    (1)求:f(x)的值域及最小正周期;   

(2)求:f(x)的單調(diào)減區(qū)間;

    (3)若,求:sin2x的值。

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