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[单选题]
3.2 The central idea of the first paragraph is to____.(1分)
A
describe how to use lubrication
B
describe how to prolong the life of a machine
C
explain the nature of friction
D
tell how to offset the disadvantages of friction
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试题答案：
C
答案解释：
相关题目
2.2 According to the passage, we can learn that the house is a____.(1分)
_______ can help curing his disease is worth trying, as sometimes folk remedy really works.(1分)
As the National Park Service celebrates its 100th anniversary(周年纪念),President Barack Obama has announced the establishment of one new national monument,and the expansion(扩大)of another.In Maine,more than 87,500 acres of forest will become government-protected parkland for the first time.In Hawaii,a national monument created by President George W.Bush in 2006 will expand to about 582,578 square miles,four times its current size. Obama has now created or enlarged 26 national monuments during his presidency.As a result,his administration says,Obama has protected more of the nation's land than any other president has.But some residents and officials,in both Maine and Hawaii,object to the plans.(78)They say their local economies depend on the use of these areas. In establishing this monument,Obama took the side of conservationists(自然资源保护者)who want laws to protect wild lands.Creating a national park usually requires the approval of Con-gress.But a 1906 federal law allows the president to establish national monuments on his own. The land's new status as a monument means that mining and drilling operations are forbidden there.(79)It may also severely limit activities such as logging,road-building,and hunting.Some of Maine's politicians who want to protect the state's logging industries say Obama should not have acted alone.They say Washington should not tell the states how to use their land,especially when people's jobs are at stake.Maine politician Susan Collins said the president should have listened to Maine lawmakers and residents,as well as to the U.S.Congress before making his decision. However,those who support the president's decision say the establishment of the new monu-ment will lead to new jobs through tourism.
23. According to the passage, “surveillance” means____.
2.4Crying was adaptive for our ancestors because____.(1分)
10.Which of the following italicized parts is a subject clause?
8. (A)vague (B)relavant (C)implicit (D)evident
. A. Against B. On C. From D. with
3. A. up B. at C. for D. down
21.3 According to the passage, all of the following groups of children can become students of special education EXCEPT____.
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1.
(8P149)1951年5月，中央人民政府与西藏地方政府达成（ ）
2.
Reading Comprehension Directions:There are three passages in this part.Each passage is followed by some ques-tions or unfinished statements.For each of them there are four choices marked A,B,C and D. If the Dakota Access Pipeline(输油管道)is completed,it will carry nearly half a million bar-rels of oil across four states every day.Energy Transfer Partners(ETP),a Texas-based company behind the$3.8 billion project,hopes to finish construction this year.But the Standing Rock Sioux,an American Indian tribe(部落),is determined to stop the 1,172-mile pipeline from being built.(76)Both sides show no signs of backing down. The Dakota Access Pipeline was announced in 2014.A section of it will run near the Standing Rock Sioux reservation.A reservation is an area of land set aside for American Indians.The tribe says the construction threatens to destroy historical areas and ancient burial sites.They also say the pipeline could pollute their main water source,the Missouri River.In April,the Standing Rock Sioux began a protest against the project.They camped at the construction site.Since then,thou-sands of people,including people from American Indian tribes,have traveled to the site to join the protest. ETP says that the pipeline will have built-in safety measures to protect against oil leaks.Work-ers will also monitor it remotely,and will be able to close valves(阀)within three minutes if leaks are detected. American Indians have been staging a nonviolent protest for months.The protest took a turn last week when police were called to keep the peace between protesters and armed security guards hired by the company. (77)Twenty-eight people have been arrested since then and charged with interfering with the pipeline construction.
3.
在内含报酬率法下，如果投资是在期初一次投入，且各年现金流入量相等，那么，年金现值系数与原始投资额成反比。（ ）
4.
计算机(本大题12小题，每小题5分，共60分。)
5.
需求分析阶段最重要的技术文档是( )。
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