瓦楞状指甲应经常做手部护理，特别要注意指甲（）。 A.表面光滑 B.表面抛光 C.表

允许中断供电时间为（）以上的供电，可选用快速自起动的发电机组。

A.10s

B.15s

C.20s

D.30s

CONVERSATION 2 (Questions 5-8)

\r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n

Booking Theatre Tickets

The speaker is a driving instuctor over (5) \r\n (6) instructor. Learning, from a private instructor is (7) than going to a big school. But at the moment the speaker is fully booked and his prices are quite (8)

银行保函的修改必须经有关当事人一致同意后，由受益人向担保行提出书面的修改申请。

请简述水环真空泵的停车顺序。

一般庭院水景池的水深可设计为（）米左右。