BTS3001C基站的频点扫描功能是在()实现,而不能在话统台登记话统实现。
参考答案:基站维护台
车削分度圆直径d1为60mm,轴向模数m为3mm的3头蜗杆。如果用分度盘分头法分头时,分度盘应转过几度?
Some scientists think there are _______ 2,000 million flashes of lightning per year.
A.in short
B.on average
C.as usual
D.in total