粗滤油器一般不装在()
A.泵的吸油口前
B.泵的输出管路中
C.重要元件之前
D.无规定
参考答案:B, C
My sister likes science , because it is ____ .[ ]
A. boring
B. sad
C. scary
D. interesting
磨音发闷时台时产量高,细度筛余增大。