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【单选题】
作为新型冠状病毒肺炎患者的密切接触者要进行医学观察( )天。
A.
24
B.
12
C.
13
D.
14
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参考答案:
举一反三
【单选题】函数【图片】在点【图片】处存在偏导数【图片】和【图片】是函数在该点可微的( ).
A.
必要 条件
B.
充分 条件
C.
充分必要 条件
D.
既不是充分 条件 也不是必要 条件
【判断题】汽车膜片弹簧离合器在分离时,膜片弹簧会产生反向锥形变形,使压盘与从动盘分离。( )
A.
正确
B.
错误
【单选题】If the cooling water temperature and the lube oil temperature in a diesel engine are too high, the cause can be ________.
A.
a dirty lube oil strainer
B.
internal water leaks
C.
an oil suction line restriction
D.
excessive wears of the cooling water pump
【判断题】由于暴雨和泥石流导致铁路货物运输受阻,造成货物逾期运到,为此铁路运输承运人应当承担赔偿责任。( )
A.
正确
B.
错误
【单选题】The second stage feed-water temperature and shell absolute pressure in a multistage, flash type, distilling plant is ___.
A.
higher than the first stage feed-water temperature and absolute shell pressure
B.
lower than the first stage feed-water temperature and absolute shell pressure
C.
the same as the first stage feed-water temperature and absolute shell pressure
D.
not related to the feed-water temperature and absolute shell pressure
【简答题】water temperature
【判断题】膜片弹簧离合器在分离时,膜片弹簧会产生反向锥形变形,使压盘与从动盘分离。
A.
正确
B.
错误
【单选题】What keeps Grimsvotn still?
A.
The slow flow of water
B.
The low water temperature
C.
The thick glacier
D.
The water pressure
【判断题】由于暴雨和泥石流导致铁路货物运输受阻,造成货物逾期运到,为此铁路运输应当承担赔偿责任。(    )
A.
正确
B.
错误
【单选题】With this cooling water temperature control, if the cooling water temperature is high, the sea water valve is____.
A.
opened
B.
closed
C.
fully closed
D.
held in its position
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