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3.如图在Rt△ABC中,∠C=90°∠B=30°,AB=2,

  则AC=  

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2.=      。

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1.在实数,   ,  中是      无理数 。

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15、- My brother enjoys swimming very much.

- So does ________.

A. yours   B. he   C. mine    D. him

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14、They elected him ______ monitor of their class for ______ second time.

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

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13、- Would you go to the cinema or stay at home?

- ________ the film is good, I ‘ll stay at home.

A. No matter what       B. In spite of

C. Even if            D. As though

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12、- What do you think of the concert?

- I really enjoyed it. I didn’t expect it was ________ wonderful.

A. as  B. more    C. most     D. very

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11、Though he has got well, he still looks _______ weak.

A. fairly  B. rather   C. much   D.too

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10、The old lady can’t hope to _______ her cold in a few days.

A. get away  B. get off   C. get out   D. get over

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9、- What will you do during Christmas vacation?

- I don’t know, but it’s about time _______ something.

A. I’m deciding   B. I’ll decide  C. I’d decide  D. I decided

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