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问题 单项选择题

施工劳务的承包人收到劳务分包人递交的结算资料后14d内进行核实，给予确认或者提出修改意见。承包人确认结算资料后（）d内向劳务分包人支付劳务报酬尾款。

A．7

B．14

C．21

D．28

答案

参考答案：B

选择题

Jenny and I ____ friends for six years. We first got to know each other at a Christmas party. But we ____

each other a couple times before that. [ ]

A. had been; have seen

B. have been; have seen

C. had been; had seen

D. have been; had seen

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单项选择题

作用机制为使虫体肌肉超极化，抑制神经-肌肉传递致虫体发生弛缓性麻醉的抗虫药是

A．阿苯达唑

B．吡喹酮

C．噻嘧啶

D．哌嗪

E．氯硝柳胺
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