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问题 选择题

You can't see well through a telescope unless          correctly to your sight.   [ ]

A. accustomed

B. adjusted  

C. admitted  

D. adopted

答案

答案：B

解答题
已知复数z1=cosα+isinα，z2=cosβ+isinβ，|z1-z2|=1．
（1）求cos（α-β）的值；
（2）若-
π
2
＜β＜0＜α＜
π
2
，且sinβ=-
3
5
，求sinα的值．
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选择题

The reason ____the little actress has been such a success is ____she is both clever and hard-working.

A．why, why

B．why, that

C．that, because

D．for, because
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