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 5,500 years 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 a 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 modem road design.
In the mid-1700s, a Frenchman came up with a new design of road—a base layer (層) of large stones covered with a thin layer of smaller stones. A Scotsman improved on this design in the 1820s and a strong, lasting road surface became a reality. At around the same lime, metal hubs (the central part of a wheel) came into being, followed by the pneumatic tyre(充氣輪胎) in 1846. Alloy wheels were invented in 1967, sixty years after the appearance of tarmac roads (柏油路). As wheel design took off, vehicles got faster and faster.
【小題1】What might explain why transport wheels didn't become popular for some time?

A.The existence of transport wheels was not known.
B.Humans carried farming tools just as well.
C.Animals were a good means of transport.
D.Few knew how to use transport wheels.
【小題2】What do we know about road design from the passage?
A.It provided conditions for wheel design to develop.
B.It was easier than wheel design.
C.It was promoted by fast-moving vehicles.
D.It improved after big changes in vehicle design.
【小題3】How is the last paragraph mainly developed?
A.By giving examples.
B.By making comparisons.
C.By following time order.
D.By making classifications.
【小題4】 What is the passage mainly about?
A.The beginning of road design.
B.The history of public transport.
C.His invention of fast-moving vehicles.
D.The development of transport wheels.


【小題1】C
【小題2】A
【小題3】C
【小題4】D

解析試題分析:本文介紹了車輪的發(fā)展歷程。第一段是引入話題--車輪的發(fā)展。第二段說明車輪發(fā)展緩慢的原因;第三段以時間順序說明車輪的發(fā)展歷程。
【小題1】考查細節(jié)理解。根據(jù)第二段第二行“This could be because animals did a perfectly good job of carrying farming tools and humans around”可知,當時車輪沒有流行起來的一種原因是動物充當了很好的交通工具。故選C。
【小題2】推理判斷題。難度:較難。根據(jù)第3段 There had been no important changes in wheel and vehicle design before the arrival of modem road design.(在現(xiàn)代道路設計之前,輪子和交通工具的設計都沒有重大變化)。第4段接著講述了隨著道路設計的進步,各種新型的輪子(包括充氣輪胎)隨之發(fā)展,而且也促進了車輛的發(fā)展。由此可知,道路設計的發(fā)展促進了車輪的發(fā)展。選A。
【小題3】考查寫作手法。根據(jù)in the mid-1700s;in the 1820s;At around the same time;in 1846;in 1967;sixty years after等時間狀語可知,最后一段是按照時間順序來展開的。故選C。
【小題4】考查文章大意。文章開頭點題,提出了世界上第一個車輪是何時發(fā)明的這個問題。第二段解釋車輪沒有很快流行起來的原因;最后一段介紹了隨著道路的發(fā)展,車輪的不斷改良。道路設計的發(fā)展只是一個促進車輪發(fā)展的因素,排除A;文章沒有介紹公共交通;排除B。故選D。
考點:說明文類短文閱讀

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