LTE中，SIB1使用下面哪个传输信道进行承载？（）
A.BCH
B.PBCH
C.DL-SCH
D.DCH
参考答案：C
I am playing _____________ trumpet (喇叭), but my brother is playing _____________ football. [ ]
A. /; the
B. the; the
C. the; /
通常一对圆柱齿轮传动比i12为（）。
A.3-5
B.5-8
C.3-8
D.1-3
