【名词&注释】
控制器(controller)、热力膨胀阀(thermostatic expansion valve)、蒸发压力调节阀(evaporating pressure regulating valve)
[单选题]在单机多库制冷装置中用于控制高温库蒸发温度的元件是( )。
A. 热力膨胀阀
B. 蒸发压力调节阀
C. 温度控制器
D. 低压控制器
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举一反三：
[单选题]The process during which liquid containing a reasonable amount of sensible heat at a particular pressure immediately changes into steam after admitted to a chamber at a lower pressure is called _____.
A. boiling off
B. flash evaporation
C. condensation
D. none of the above
[单选题]水中的求生者采取HELP姿势的作用主要是：
A. 增加浮力
B. 保存体温
C. 节省力气
D. 容易被发现
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