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1、河北省武邑中学2018-2019学年高二英语上学期寒假作业13第一节 （共10小题；每小题2分，共20分）阅读下面短文,从每题所给的四个选项（A、B、C和D）中,选出最佳选项,并在答题卡上将该项涂黑。ANo one is sure how the ancient Egyptians built the pyramids near Cairo. But a new study suggests they used a little rock n roll. Long-ago builders could have attached wooden poles to the stones and r
2、olled them across the sand, the scientists say.“Technically, I think what theyre proposing is possible,” physicist Daniel Bonn said.People have long puzzled over how the Egyptians moved such huge rocks. And theres no obvious answer. On average, each of the two million big stones weighed about as muc
3、h as a large pickup truck. The Egyptians somehow moved the stone blocks to the pyramid site from about one kilometer away.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). Then they would h
4、ave dragged them along paths. To make the work easier, workers may have lubricated 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 from the sand supports this idea.Researchers found small
5、amounts of fat, as well as a large amount of stone and the remains of paths.However, physicist Joseph West thinks there might have been a simpler way, who led the new study. West said, “I was inspired while watching a television program showing how sleds might have helped with pyramid construction.
6、I thought, Why dont they just try rolling the things? ” A square could be turned into a rough sort of wheel by attaching wooden poles to its sides, he realized. That, he notes, should make a block of stone “a lot easier to roll than a square”.So he tried it .He and his students tied some poles to ea
7、ch 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 calculate
8、d that rolling the block required about as much force as moving it along a slippery(滑的)path.West hasnt tested his idea on larger blocks, but he thinks rolling has clear advantages over sliding. At least, workers wouldnt have needed to carry cattle fat or water to smooth the paths.28. Its widely beli
9、eved that the stone blocks were moved to the pyramid site by _.A. rolling them on roads B. pushing them over the sandC. dragging them on some poles D. sliding them on smooth paths29. What does the underlined word “it” in Paragraph 7 refer to?A. Rolling the blocks with poles attached.B. Rolling the b
10、locks on wooden wheels.C. Rolling poles to move the blocks.D. Rolling the blocks with fat.30. Why is rolling better than sliding according to West?A. Because more force is needed for sliding.B. Because rolling work can be done by fewer cattle.C. Because sliding on smooth roads is more dangerous.D. B
11、ecause less preparation on paths is needed for rolling.31. What is the text mainly about?A. An application of the method of moving blocks to the pyramid site.B. An experiment on ways of moving blocks to the pyramid site.C. An argument about different methods of moving blocks to the pyramid site.D. A
12、n introduction to a possible new way of moving blocks to the pyramid site.BWith rapid advances in medical science, cloning is slowly but surely looking like it could be in our near future. However, is it really an option that should be considered as a way to extend human life?Reproductive cloning ma
13、y help human families gain children, and theres also a benefit for the animal world. It brings hope to people eager for children but unable to have their own or adopt. It can also bring about the recreation of species that have long since died, allowing scientists to fully study the species as a liv
14、ing creature instead of simply looking at images or bones.Many believe that cloning can be used to replace failing organs. This will reduce the waiting list for organ donations and allow more people to be saved. Not only that, but because the organ is, in fact, your own organ, there would be less ch
15、ance of rejection.Cloning could prove helpful in genetic research. Using cloning technologies, genetic researchers would have a better understanding of composition of genes and the effects of genetic constituents（成分）on human characters. Theres also the possibility of changing genetic constituents in
16、 cloned humans, and cloning could help fight genetic diseases.While the cloning of body organs can help extend human life, it could also cause a lot of malpractice （玩忽职守）. Along with the ability to clone desired characters, there could be the possibility of people deliberately reproducing undesired characters. This could lead to a rise in malpractice within society.Cloning involves a process
