問題詳情
【題組】65. What do we know about road design from the passage?
(A). It was easier than wheel design.
(B). It improved after big changes in vehicle design.
(C). It was promoted by fast-moving vehicles.
(D). It provided conditions for wheel design to develop.
參考答案
答案：D
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)