制冷压缩机使用旁通能量调节阀后，压缩机的（）。
A.吸气温度降低
B.吸气温度增高
C.排气温度增高
D.排气温度降低
参考答案：B, C
The Silent Way is considered suitable for______.
A．more advanced learners
B．beginners
C．more advanced classes and beginners
D．learners interaction with each other
铣床上常用的镗刀有哪几种？
