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【单选题】
185制冷装置正常运行不发生故障时没有任何动作的自动化元件是 。1-压缩机;2一滑油分离器;3一冷凝器;4—储液器;5一干燥过滤器;6—电磁阀;7—温度控器8—膨胀阀9一蒸发器;10—止回阀;11一蒸发压力调节阀;l2一旁通调节阀;13—低压控制器14—高压控制器;15一油压差控制器;l6一注液阀;17—水量调节阀;18—安全阀A.
13
B.
14
C.
15
D.
7
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【单选题】Some guests prefer to ______ their guest folios, go to their homes, and later receive a certain invoice.
A.
draw
B.
imprint
C.
copy
D.
sign
【单选题】She wanted to serve some coffee to her guests however, _________.
A.
she hadn't many sugar
B.
there was not a great amount of the sugar
C.
she did not have much sugar
D.
she was lacking in amount of the Sugar.
【单选题】The difference between atmospheric pressure and a partial vacuum is known as:
A.
vacuum.
B.
humidity.
C.
absolute pressure.
D.
barometric pressure.
【简答题】Unsatisfied about their dormitory conditions on the campus, some college students prefer to live off campus. This has caused concern of the authorities. What is your opinion about the matter? Write an...
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