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
