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问题 填空题

已知圆锥的底面半径为4cm，高为3cm，则这个圆锥的侧面积为（    ）cm2．

答案

20

选择题
已知函数y=f（2x）的定义域为[-1，1]，则函数y=f（log2x）的定义域为（　　）
A．[-1，1]B．[
1
2
，2]		C．[1，2]D．[
2
，4]
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选择题

The teacher, as well as his students, ____ have a trip to the seaside next vacation. [ ]

A. are going to

B. is going to

C. would go

D. are going

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