载荷较小，转速较高，旋转精度要求较高时宜选用（）轴承。
A、滚子
B、球
C、圆锥滚子
D、单列向心滚子
参考答案：B
The patient will have to remain in hospital for another week the recent medical report.
A．on behalf of
B．on the basis of
C．on the side of
D．on top of
简述冷却液消耗过多。
