Which of the following is TRUE about the man

A．He didn’t suspect that she already knew his past.

B．He realized that she knew very few about him.

C．He suspected her because she knew almost everything.

D．He suspected her past.

机翼的什么部位积冰对升力的影响最大（）.

A.机翼下表面

B.机翼的上表面前段

C.机翼翼根