滚动轴承径向间隙达（）mm，球柱表面出现班痕。
参考答案：0.5
is known to all that Taiwan is part of China and it shall not be separated from the mainland.
A．That
B．As
C．It
D．What
某调相波的最大频偏△fm =l0kHz，若调制信号的振幅增大一倍，调制频率也提高一倍，则该调相波的最大频偏变为（）
