Two-thirds of the Northern Irish have Scottish or English roots.
查看答案
Men should extend their hand to women first.
A. 对
B. 错
Presentations should be detailed and subdued.
A. 对
B. 错
可以盲降的跑道属于：
A. I类精密进近跑道
B. II类精密进近跑道
C. III类B级精密进近跑道
D. IIIC级精密进近跑道
20、三条平行跑道字母从左至右命名为( )
A. L、R、C
B. L、C、R
C、L、R
D. 以上都不对
微信支付 
支付宝支付