机载ATC应答机应答发射时,()不能发射。
A、DME
B、TCAS
C、DME和TCAS
D、DME、TCAS和LRRA
参考答案:C
—Did you watch the cartoon film Astro Boy in the People’s Theatre last night?
—I had planned to, but it_________hard all the time.
A.is raining
B.was raining
C.has rained
D.rained
急性心肌梗死时AST的变化规律是
A.6~10小时开始升高,24~48小时达高峰,持续3~5天B.2~3小时开始升高,12小时达高峰,持续7~9天C.48~72小时开始升高,7~9天达高峰,持续14~18天D.5小时开始升高,24小时达高峰,持续3~5天E.6~10小时开始升高,36~48小时达高峰,持续7~14天