“腼腆”两字都是上声。( )
参考答案:错
We look forward to()the goods in the fourth quarter.
A.the delivery of
B.your delivery
C.deliver
D.delivery
备用姿态指引仪的ILS信号来自于:()
A、备用ILS系统
B、L MMR
C、R MMR
D、L和R MMR