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【单选题】
“体育起源于游戏”,该观点是德国________席勒首先提出的。A.
政治家
B.
革命家
C.
军事家
D.
哲学家
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举一反三
【单选题】In terms of pressure and temperature in the refrigerant in the compressor, what happens to the primary? .
A.
its pressure and temperature are both lowered
B.
its pressure and temperature are both raised
C.
its pressure is lowered and its temperature is raised
D.
its pressure is raised and its temperature is lowered
【单选题】In terms of pressure and temperature refrigerant in the compressor, what happens to the primary?
A.
Its pressure and temperature are both lowered
B.
Its pressure and temperature are both raised
C.
Its pressure is lowered and its temperature is raised
D.
Its pressure is raised and its temperature is lowered
【单选题】Which of the following terms is used to identify the pressure of the liquid entering a pump?
A.
Suction head
B.
Pump head
C.
Discharge head
D.
Total head
【单选题】Barometer readings in weather reports are given in terms of pressure at ______.
A.
sea level
B.
China Sea
C.
the weather station
D.
the broadcasting station
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