19.No one is sure how the ancient Egyptians built the pyramids(金字塔) near Cairo.But a new study suggests long-ago builders could have tied wooden poles to the stones and rolled them across the sand,the scientists say.
"Strictly speaking,I think what they're suggesting is possible,"physicist Daniel Bonn said.
People have long been puzzled over how the Egyptians moved such huge rocks to the pyramid site from about one kilometer away.And there's no clear answer.
The most popular view is that Egyptian workers slid the blocks(石塊) along smooth paths.Many scientists suspect workers first would have put the blocks on sleds(滑板).Then they would have dragged them along paths.To make the work easier,workers may have lubricated(潤滑) the paths either with wet clay or with the fat from cattle.Bonn has now tested this idea by building small sleds and dragging heavy objects over sand.
Evidence(證據(jù)) from the sand supports this idea.Researchers found small amounts of fat,as well as a large amount of stone and the remains of paths.
However,physicist Joseph West think there might have been a simpler way,who led the new study.West said,"I was inspired while watching a television program:Why don't they just try rolling the things?A square (方形) could be turned into a rough sort of wheel by tying wooden poles to its sides.That should make a block of stone easier to roll than a square".
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.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 thinks rolling has clear advantages over sliding.At least,workers wouldn't have needed to carry cattle fat or water to smooth the paths.
25.It's widely believed that the stone blocks were moved to the pyramid site byC.
A.rolling them on roads
B.pushing them over the sand
C.sliding them on smooth paths
D.dragging them on some poles
26.What does the underlined word"it"in Paragraph 7refer to?A
A.Rolling the blocks with poles tied.
B.Rolling the blocks on wooden wheels.
C.Rolling poles to move the blocks.
D.rolling the blocks with fat.
27.Why is rolling better than sliding according to West?D
A.Because more force is needed for sliding.
B.Because rolling work can be done by fewer cattle.
C.Because sliding on smooth road is more dangerous.
D.Because less preparation on path is needed for rolling.
28.What is the text mainly about?D
A.An experiment on ways of moving blocks to the pyramid site.
B.An application of the method of moving blocks to the pyramid site.
C.An argument about how ancient Egyptians built pyramids
D.Views about the ways of moving blocks to the pyramid site.
分析 文章主要講述了一種新的把石塊移動到金字塔所在地的方法.
解答 25. C 細(xì)節(jié)理解題.根據(jù)第四段中的"The most popular view is that Egyptian workers slid the blocks along smooth paths.Many scientists suspect workers first would have put the blocks on sleds (滑板).",可知選C.
26. A 詞義猜測題."it"為代詞,因而應(yīng)該指代上文;根據(jù)上一段內(nèi)容,可知"it"指代"把桿綁在石塊上,然后滾動石塊".故選A.
27. D 細(xì)節(jié)理解題.根據(jù)最后一句"workers wouldn't have needed to carry cattle fat or water to smooth the paths.",可知,滾動石塊不需做光滑路面的準(zhǔn)備工作.故選D.
28. D 主旨大意題.根據(jù)第一段中的"a new study suggests long-ago builders could have tied wooden poles to the stones and rolled them across the sand,the scientists say."及文章內(nèi)容可知,文章主要講述了一種新的把石塊移動到金字塔所在地的方法.故選D.
點(diǎn)評 本文是一個人物故事類閱讀理解,題目涉及多道細(xì)節(jié)理解題,做題時結(jié)合原文和題目有針對性的找出相關(guān)語句進(jìn)行仔細(xì)分析,結(jié)合選項(xiàng)選出正確答案.推理判斷題也是要在抓住關(guān)鍵句子的基礎(chǔ)上合理的分析才能得出正確答案,切忌胡亂猜測,一定要做到有理有據(jù).