垂直于某一个投影面的直线与,另外两个投影面()。A、倾斜 B、相交 C、垂直 D、平

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问题:

垂直于某一个投影面的直线与,另外两个投影面()。

A、倾斜

B、相交

C、垂直

D、平行

考点:油气田水处理工考试初级油气田水处理工考试初级油气田水处理工考试题库
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电网科学技术发展的需要是什么?

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Once upon a time there lived a poor farmer called Smith. He didn't like to share things with others. Smith had a friend who was famous for the wonderful apples he grew.

One day, his friend gave Smith a young apple tree and told him to take it home and planted. The farmer was pleased with the gift, but when he got home, he did not know where to plant

He thought and thought. Finally at night he planted the tree in his wood where no one could see it. But without sunlight and good soil, the tree soon died.

Later the friend asked the farmer why he had planted the tree in such a poor place.

"What's the difference?" the farmer said angrily. "If I had planted it near the road, strangers would have stolen the fruit. If I had planted it in one of my fields, my neighbors would have come at night and stolen some of the apples. If I had planted it near my house, my own children would have taken the fruit,"

"Yes," said the friend, "but at least someone could have enjoyed the fruit. Now you not only have got nothing, but also you have destroyed a good apple tree."

小题1:Was Smith happy about the gift?

小题2:When did he plant the apple tree?

小题3:Where did Smith plant the apple tree in the end?

小题4: Why did the apple tree soon die?

小题5: What would probably happen if the farmer had planted the tree near his house?

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甲巯咪唑的初治剂量是一日()

A.5~15mg

B.15~60mg

C.25~80mg

D.30~60mg

E.300~600mg

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受弯构件减小受力裂缝宽度最有效的措施之一是()。

A.增加受拉钢筋面面积,减小裂缝截面的钢筋应力 

B.提高混凝土强度等级 

C.增加截面尺寸 

D.增加钢筋的直径

题型:单项选择题

353130B型轴承每列滚子数为()个。

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