题目内容

贮藏品标签上应标明贮藏品真实属性的专用名称。

A. 正确
B. 错误

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A solenoid valve used in a refrigeration system should be installed （）.

A. with the axis of the solenoid horizontal, sensing temperature of the box, and upstream of the thermal expansion valve
B. upright, sensing temperature of the box, and upstream of the thermal expansion valve
C. upright, sensing temperature of the box, and downstream of the thermal expansion valve
D. upright, sensing heat of the tail coil, and upstream of the thermal expansion valve

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