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【多选题】
下列哪些情况下可考虑采用沉井基础（）A.
上部荷载较大，表层地基土承载力不足
B.
经济合理性
C.
在山区河流中，虽土质较好，但冲刷大，或河中有较大卵石不便桩基础施工
D.
岩层表面较平坦且覆盖层薄，但河水较深，采用扩大基坑施工围堰有困难
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【简答题】无源逆变时将直流电转变为 需要的不同频率和电压值的交流电。 实现无源逆变的装置称为 ,简称 。
【单选题】Which of the following advice is NOT given about the womans purse?
A.
Mending the hole in the purse.
B.
Putting a pen in the purse.
C.
Keeping a zip-locked bag of note cards.
D.
Putting receipts in a separate place in the purse.
【单选题】Black Holes What is a black hole? Well, it's difficult to answer this question, since the terms we normally use to describe a scientific phenomenon are inadequate here, Astronomers and scientists thin...
A.
The black hole is a region of space.
B.
The black hole sucks in any object that passes by it.
C.
The black hole is visible through an infrared telescope.
D.
The black hole has no matter.
【判断题】The phrase “burn a hole in one’s pocket” is usually applied to money, suggesting that the person with the money feels the need to spend it quickly.()
A.
正确
B.
错误
【单选题】----Th ere’s a hole in your bag. ---- I know, I’m going to have it _____.
A.
mend
B.
mending
C.
mended
D.
to be mended
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