10.Almost every machine with moving parts has wheels,yet no one knows exactiy 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 2002in slovenia.It is over 5.100years old.Evidence suggests that wheels for transport didn't become popular for a while,though.this couid 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,butthis difficult situation appeared againa 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(层)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 amund the same time,metal hubs(the centrnl part of wheel)came into being,followed by theWheels were invented in 1967,sixty years after the appearance of tarmacked roads(泊油路).As wheel design took off,vehicles got faster and faster.
64.What might explain why transport wheels didn't become popular for some time?C
A.Few knew how to use transport wheels.
B.Humans carried farming tools just as well.
C.Animals were a good means of transport.
D.The existence of transport wheels was not known.
65.What do we know about road design from the passage?D
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.
66.How is the last paragraph mainly developed?C
A.By giving examples.
B.By making comparisons.
C.By following time order.
D.By making classifications.
67.What is the passage mainly about?B
A.The beginning of road deaign.
B.The development of transport wheels.
C.The history of public transport.
D.The invention of fast-moving vehicles.
分析 本文主要讲述了最古老的运输没有车轮,车轮的发展历程以及道路设计对车轮发展的影响,作者通过这篇文章向我们介绍了车轮的发展以及运输的发展经过.
解答 64.C推理判断题.根据第二段This could be because animals did a perfectly good job of carrying farming tools and humans around.这或许是因为动物在拉运农具人们的方面做得不错.可知由于当时动物使用的方便让轮子没能够普及.故选C.
65.D推理判断题.根据第3段 There had been no important changes in wheel and vehicle design before the arrival of modem road design.在现代道路设计之前,轮子和交通工具的设计都没有重大变化,而第4段接着讲述了随着道路设计的进步,各种新型的轮子随之发展,而且也促进了车辆的发展.由此可知,道路设计的发展促进了车轮的发展.故选D.
66.C理解推断题,由最后一段中的In the mid-1700s; in the 1820s;At amund the same time; in 1967;可知最后一段是按照时间顺序写的,故选C.
67.B主旨大意题,通读全文可知本文讲述了车轮的发展历程以及道路设计对车轮发展的影响,故选C.
点评 本文考察学生科教类阅读的水平,同学们就要注意平时多读科普知识类文章,学习科普知识,积累常见的科普词汇,同时要根据题目中关键词到文中寻找相应答案.