飞行中，责任机长失能时（）
A.在座的另一名飞行员接替指挥权
B.飞机着陆后可以再次起飞
C.由任何一名其他飞行员接替
D.以上都不对
参考答案：A
----Have you ever seen Peter recently ?
---Yes . He _____ me to ask you how you _____ along with your new job these days .
A．has asked ; have been getting
B．asked ; were getting
C．often asks ; are getting
D．asked ; are getting
如图所示,光源S发出的光经狭缝A沿半径射至折射率的半圆柱形玻璃砖的圆心O处后,有两条光线OB,OC射回空气中,玻璃砖绕O轴旋转,∠BOC的最大值是__________,最小值是__________.当入射光AO与出射光OC的夹角为__________时,另一出射光OB恰好消失.
的半圆柱形玻璃砖的圆心O处后,有两条光线OB,OC射回空气中,玻璃砖绕O轴旋转,∠BOC的最大值是__________,最小值是__________.当入射光AO与出射光OC的夹角为__________时,另一出射光OB恰好消失.