【单选题】A greenhouse is a building _______ of glass _______ for keeping plants warm when the outside temperature is low..
B.
which is made, is used
【判断题】韩非子认为天下之人皆自私自利,互相用计算之心相待。()
【单选题】轮胎上的英文标识“TEMPERA、TUREA、”表示()
【单选题】In a refrigeration system, if the cooling water to the condenser fails, the .
A.
box temperature solenoid valve will close
B.
expansion valve will close
C.
compressor will shutdown