中国列车运行控制系统(CTCS)有两个子系统是()。
A.车载子系统
B.地面子系统
C.红外线监测系统
D.无线通信网络(GSM—R)
参考答案:A, B
用cast down,cast away,cast off,cast out,cast about/around for的适当形式填空.
① Finding out the truth made Tom__________.
②She's__________three boyfriends in a week.
③They were_________on a desert island.
④He___________hurriedly__________for something to say.
⑤He claimed to have the power__________the enemy.
Ⅰ型单纯疱疹病毒复发感染常见的部位是()
A.颊粘膜
B.舌背黏膜
C.舌腹及舌侧缘黏膜
D.唇粘膜
E.唇红及周缘皮肤