RACH是什么信道（）
A.物理上行共享信道，
B.物理上行控制信道，
C.随机接入信道，
D.广播信道.
参考答案：C
Whenever the teacher was not here,the children make a lot of noise.
A．will
B．would
C．were to
D．were going to
ATF散热器管路堵塞会导致ATF易变质。
