到点短消息可以在以下那些逻辑信道传送：（）
A.SDCCH
B.TCH
C.SACCH
D.FACCH
参考答案：A, C, D
--- Can your factory really afford ____ food for the people in the flooded area?
--- I believe we can because we have ____ workers.
A．anumberof;plentyof
B．alargeamountof;thenumberof
C．plentyof;thenumberof
D．alargeamountof;anumberof
CO轻度中毒的症状有：轻度的头痛、头晕、眼睛发花、全身无力，在劳动时感到呼吸有些急迫短促。（）
