大中型活塞式制冷压缩机采用______的方法调节冷量。
A.变频调节 B.压缩机停、开C.预开部分气缸的吸气阀片 D.滑阀调节
参考答案:C
I was impressed _______ his huge feet ________ approximately 1 foot 8 inches. [ ]
A. in; measuring
B. about; measured
C. with; measuring
D. for; measured
装配栓头螺栓时,应采取咬合措施。