So he tried it.
He and his students tied some poles to each of four sides of a 30-kilogram stone block. That action turned the block into somewhat a wheel. Then they placed the block on the ground.
They wrapped one end of a rope around the block and pulled. The researchers found they could easily roll the block along different kinds of paths. They calculated that rolling the block required about as much force as moving it along a slippery(滑的)path.
West hasn’t tested his idea on larger blocks, but he thinks rolling has clear advantages over sliding. At least, workers wouldn’t have needed to carry cattle fat or water to smooth the paths.
46.It抯 widely believed that the stone blocks were moved to the pyramid site by ______.i
A. rolling them on roads
B. pushing them over the sand
C. sliding them on smooth paths
D. dragging them on some poles
47.The underlined part “lubricated the paths” in Paragraph 4 means____.
A. made the path wet
B. made the path hard
C. made the path wide
D. made the path slippery
48.What does the underlined word 搃t攊n Paragraph 7 refer to?th
A. Rolling the blocks with poles attached.
B. Rolling the blocks on wooden wheels.
【五年高考(2011-2015)英语试题分项精解:专题23 阅读理解之科普知识类(解析版)】相关文章:
★ 2017高考四川省广安市英语阅读理解一轮系列训练:17(含解析)
★ 2017高考四川省广安市英语阅读理解一轮系列训练:26(含解析)
★ 2017高考四川省广安市英语阅读理解一轮系列训练:23(含解析)
★ 2017高考四川省广安市英语阅读理解一轮系列训练:16(含解析)
★ 2017年高考英语二轮复习精品资料:专题14 阅读理解(教学案)(原卷版)
★ 2017届高考英语二轮复习大题冲关秘籍阅读理解七选五:考纲解读(含解析)
★ 2017高考四川省广安市英语阅读理解一轮系列训练:25(含解析)
★ 2017高考四川省广安市英语阅读理解一轮系列训练:30(含解析)
★ 2017高考四川省广安市英语阅读理解一轮系列训练:13(含解析)
最新
2017-04-24
2017-04-24
2017-04-24
2017-04-24
2017-04-21
2017-04-21