问题详情

We may conclude from reading the passage that ______.
A．a hovercraft can not fly high because of the surrounding high-pressure air
B．a hovercraft is as much in use as a plane
C．a hovercraft "flies" with a greater speed than ships
D．a hovercraft also has the problem of wave resistance请帮忙给出正确答案和分析，谢谢！