以下哪些是TDSCDMA系统中使用的物理层信令（）
A.TFCS
B.TCP
C.SS
D.FPACH
参考答案：C
The world's population has grown to more than six times _____ it was in 1800. [ ]
A. which
B. that
C. what
D. the number
Powerpoint2000中没有的对齐方式是( )
A．两端对齐
B．分散对齐
C．右对齐
D．左对齐
