活塞压缩环的泵油现象主要是因为：
D
暂无解析
things，in，are，the，now，the，car
_________________________________
—Haveyougotadictionary?
—_______________
She______(watch)TVeveryevening.
What’sthew_____likeinspring?It'swarm
()_____youseetheblackboard?
