汽车向左转向时，（）车轮的转速最快。
A.左前轮
B.右前轮
C.左后轮
D.右后轮
参考答案：B
I can't find the book about famous sportsmen _____ I borrowed from the library yesterday. [ ]
A. which
B. who
C. what
D. whom
KXJ-114洗井器总长为（）mm。
A、550
B、570
C、580
D、590
