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【单选题】
Chart depth is the ______.A.
vertical distance from the chart sounding datum to the ocean bottom, plus the height of tide
B.
vertical distance from the chart sounding datum to the ocean bottom
C.
average height of water over a specified period of time
D.
average height of all low waters at a place
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【单选题】Miss Li ___as a secretary for five years in the company, and now she is general manager of it.
A.
serves
B.
served
C.
has served
D.
had served
【单选题】Miss Li ___ as a secretary for five years in the company, and now she is general manager of it.
A.
has served
B.
had served
C.
served
D.
serves
【单选题】14-53. Which of the following italicized parts is used as an object complement?
A.
The front door remained locked
B.
The boy looked disappointed .
C.
Nancy appeared worried .
D.
He seemed to have no money left .
【简答题】财政政策对增加均衡国民收入效果较好的条件是什么？
【简答题】交流工频安全电压的上限值是指在任何情况下,两导体间或任一导体与地之间的电压都不得超过()V。
【简答题】交流工频安全电压的上限值,在任何情况下,两导体间或任一导体与地之间都不得超过() V 。
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