循环球式转向器的钢球拆下后应()
A.将全部钢球清洗后放在一起
B.按轫道清洗分开放置
C.测量后按直径大小分开放置
参考答案:B
2cos245°-tan60°•tan30°.
The two dogs started to fight, so we tried to _____ them.
A.split
B.separate
C.tear
D.divide