往复泵、回转泵属于()。
A.动力式泵
B.容积式泵
C.直联式泵
D.水环式泵
参考答案:B
______ to forget is a good way to solve our problems and we can also deal with them by ______ of something worse.
A.Learn; think
B.Learning; think
C.Learning; thinking
D.Learn; thinking
若燃油管路内混有空气,容易造成增压器喘振。