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单选题
当逆时针转动排放活门时，没有液体流出, 除非按压该活门。
A
Turn the drain valve counterclockwise to cause the fluid to stop flowing before the valve is pushed.
B
When you turn the drain valve counterclockwise, no fluid will flow until you push the valve in.
C
Make sure there is no fluid flowing after the valve is pushed, then turn the drain valve clockwise.
答案解析
正确答案：B
相关知识点：
逆时针转阀，按压才有液流
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