既调节,又要切断时,可选用偏心旋转阀。
参考答案:对
若m为有理数,则|m|﹣m的值为[ ]
A.大于0
B.大于等于0
C.小于0
D.小于等于0
136. ---I’ll thank you ______ my affairs _______.
--- I will. It’s none of my business.
A.for leaving; out
B.to leave; alone
C.for leaving; alone
D.to leave; out