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问题 单项选择题

我国防止海域污染的规定中，距最近陆地50海里以上的航行船舶排放含油污水时，瞬时排放率小于30升/海里，该类船舶指的是150总吨及以上的（）。

A．干货船

B．油船

C．客货船

D．液货船

答案

参考答案：B

填空题

在《验证力的平行四边形定则》的实验中，有甲、乙两位同学合作完成实验操作并记录了力的大小和方向，然后两位同学在数据处理上有如图甲、乙所示的两种方案，下列作图方案和对合力理解正确的是______

A．甲同学的方案正确

B．乙同学的方案正确

C．甲图中F′是F1、F2合力的真实值

D．甲图中F是F1、F2合力的真实值．
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单项选择题

Sometimes we have specific problems with our mother; sometimes, life with her can just be hard work. If there are difficulties in your (1) , it’s best to deal with them, (2) remember that any (3) should be done (4) person or by letter. The telephone is not a good (5) because it is too easy (6) either side to (7) the conversation.

Explain to her (8) you find difficult in your relationship and then (9) some new arrangements that you think would establish a (10) balance between you. Sometimes we hold (11) from establishing such boundaries because we are afraid that doing (12) implies we are (13) her. We need to remember that being (14) from our mother does not (15) mean that we no longer love her. If the conflict is (16) and you cannot find a way to (17) it, you might decide to give up your relationship with your mother for a while. Some of my patients had (18) "trial separations". The (19) allowed things to simmer down, enabling (20) .

12（）

A.it

B.which

C.what

D.so
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