【預告】4/1起,頁面上方功能列以及下方資訊全面更換新版。 前往查看

高考◆英语◆重庆市題庫下載題庫

上一題
C Almost every machine with moving parts has wheels, yet no one knows exactly when the first wheel was invented or what it was used for. We do know,however,that they existed over 5,500years ago in ancient Asia. The oldest known transport wheel was discovered in 2002 in Slovenia. It is over 5,100 years old. Evidence suggests that wheels for transport didn't become popular for .while, though . This could be because animals did a perfectly good job of carrying farming tools and humans around. But it could also be because of a difficult situation. While wheels need to roll on smooth surfaces, roads with smooth surfaces weren't going to be constructed until there was plenty of demand for them. Eventually,road surfaces did become smoother, but this difficult situation appeared again a few centuries later. There had been no important changes in wheel and vehicle design before the arrival of modern road design. In the mid-1700s,a Frenchman came up with a new design of road--a base layer (层)of large stones covered with a thin layer of smaller atones. A Scotsman improved on this design in the 1820s and a strong,lasting road surface became a reality.At around the same time,metal hubs(the central part of awheel)came into being,followed by the
【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.


答案:D
難度: 計算中

C Almost every machine with moving part..-阿摩線上測驗