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【单选题】
按( )键可在选择的帧上创建空白。A.
F6
B.
F5
C.
F7
D.
F12;
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反馈参考答案：
举一反三
【单选题】What keeps Grimsvoto still?
A.
The slow flow of water．
B.
The low water temperature．
C.
The thick glacier．
D.
The water pressure．
【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
【单选题】If the water temperature had increased after submerging resistor B, which of the following statements would have been most accurate?
A.
The fact that the water temperature increased after submerging Resistor B shows that resistor B is a thermistor.
B.
The fact that the water temperature increased after submerging Resistor B shows that resistor B is not an ohmic device.
C.
Since the measured current was the same when the initial water temperature was 23°C as when it was 25°C,resistor B is an ohmic device.
D.
Since the measured current was the same when the initial water temperature was 23°C as when it was 25°C,resistor B is not a thermistor.
【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
【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
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