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问题 单项选择题

居住建筑电气与照明的优选项中要求当用电设备容量达到250KW或变压器容量在160KWA以上时，采用（）KV或以上供电电源

A.10

B.30

C.100

D.50

答案

参考答案：A

问答题 简答题

简述植物对异花传粉的适应性。
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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) .

6（）

A.on

B.for

C.off

D.to
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