問題詳情
【題組】54．As mentioned in the last paragraph，a wind tunnel can be used to find out____.A．how fast a plane can rise B．how smooth a plane’s surface isC．how a plane lands in a strong wind D．how a plane drops at a low height
參考答案
答案：A
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)