题目内容：
In cold, damp weather, the buildup of ice on airplane wings can pose significant aerodynamic problems. Which of the following effects would you expect?
A.As ice builds up on the top of the wing, drag increases.
B.As ice builds up on the top of the wing, lift increases.
C.As ice builds up on bottom of the wing, lift decreases.
D.All of the above
参考答案：