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问题 单项选择题

工程交工、验收的依据是( )对单位工程质量等级的检定。

A．质量监督站

B．监工程师

C．业主

D．建设单位主管部门

答案

参考答案：A

选择题
下列函数中，周期为π，且在[
π
4
，
π
2
]上单调递增的奇函数是（　　）
A．y=sin(x-
π
2
)		B．y=cos(2x-
π
2
)		C．y=sin(2x+
π
2
)		D．y=cos(2x+
π
2
)
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单项选择题

It was not until she arrived at the classroom she realized she had forgotten her coursebook.

A．and she realized

B．which she realized

C．then she realized

D．that she realized
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