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5.计算 =       。

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4.如图正方形的边长为4cm,则图中阴影部分

的面积为    cm2

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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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    5. pancake  6. overcoat   7. airplane  8. friendship

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8. Though we will not see each other as often as before, I believe our _________ will last forever.

Key:

Unit 3

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7. -How do you usually go to America, Mr Yang?

  -By _________. You know, it’s far away from here.

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6. It’s rather cold outside. You’d better wear your _________, Sam.

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5. I’m hungry now. Could you please give me a piece of _________?

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