A-A+
A wind tunnel can be used to find out ________
问题详情
A wind tunnel can be used to find out ________.
[A] how fast a plane can rise
[B] how smooth a plane’s surface is
[C] if a plane can land in a very strong wind
[D] if a plane will drop when flying at a low height请帮忙给出正确答案和分析,谢谢!
参考答案
正确答案:A