(EMB145)在什么时候captain DAP上的EMER按钮被选择()
A.captain只与COM1,NAV1连接
B.观察员通过无线电的通讯丢失
C.以上都对
参考答案:C
–You can’t imagine _______ great fun chatting online is.
– Really? But it may cause you a lot of trouble.
A.what
B.how
C.why
D.whether
A.I= ,从上向下
B.I= ,从上向下
C.I= ,从下向上
D.I= ,从下向上