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【单选题】
异位妊娠最常见的原因是A.
输卵管发育不良
B.
输卵管过长过短
C.
放置宫内节育器
D.
辅助生殖技术
E.
输卵管炎症
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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
【多选题】To express diffusivity equation in terms of pressure and time , we assume ( ) .
A.
=constant
B.
=constant
C.
=constant
D.
=constant
【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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