下列轴承即承受径向载荷又承受轴向载荷的是（）
A.深沟球轴承
B.圆锥滚子轴承
C.推力球轴承
D.滚针轴承
参考答案：A
Do you have ____________ warm clothes?[ ]
A. so
B. enough
C. too
Many great changes _____ in Beijing in these years. [ ]
A. took place
B. have taken place
C. have been taken place
D. have happened
