对含水层来说其压缩性主要表现在（）和（）。

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问题填空题

答案

参考答案：空隙；水的压缩上

填空题

1. Mike is sitting near the ___________. He wants to ___________ an e-mail to his friend.
2. — Where do I write the address on a postcard? — On the ___________.
3. — Where is the sun? — It's in the ___________, ___________ corner of the picture.

选择题

171. She works seven days a week, and six of _____ until one o’clock at night.

A．that

B．the time

C．which

D．Them