问题 单项选择题

The ocean bottom—a region nearly 2.5 times greater than the total land area of the Earth —is a vast frontier that even today is largely unexplored and uncharted. Until about a century ago, the deep-ocean floor was completely inaccessible, hidden beneath waters averaging over 3,600 meters deep. Totally without light and subjected to intense pressures hundreds of times greater than at the Earth’s surface, the deep-ocean bottom is a hostile environment to humans, in some ways as forbidding and remote as the void of outer space.
Although researchers have taken samples of deep-ocean rocks and sediments for over a century, the first detailed global investigation of the ocean bottom did not actually start until 1968, with the beginning of the National Science Foundation’s Deep Sea Drilling Project (DSDP). Using techniques first developed for the offshore oil and gas industry, the DSDP’s drill ship, the Glomar Challenger, was able to maintain a steady position on the ocean’s surface and drill in very deep waters, extracting samples of sediments and rock from the ocean floor.
The Glomar Challenger completed 96 voyages in a 15-year research program that ended in November 1983. During this time, the vessel logged 600,000 kilometers and took almost 20,000 core samples of seabed sediments and rocks at 624 drilling sites around the world. The Glomar Challenger’s core samples have allowed geologists to reconstruct what the planet looked like hundreds of millions of years ago and to calculate what it will probably look like millions of years in the future. Today, largely on the strength of evidence gathered during the Glomar Challenger’s voyages, nearly all earth scientists agree on the theories of plate tectonics and continental drift that explain many of the geological processes that shape the Earth.
The cores of sediment drilled by the Glomar Challenger have also yielded information critical to understanding the world’s past climates. Deep-ocean sediments provide a climatic record stretching back hundreds of millions of years, because they are largely isolated from the mechanical erosion and the intense chemical and biological activity that rapidly destroy much land-based evidence of past climates. This record has already provided insights into the patterns and causes of past climatic change—information that may be used to predict future climates.

The Deep Sea Drilling Project was significant because it was______.

A.an attempt to find new sources of oil and gas

B.the first extensive exploration of the ocean bottom

C.composed of geologists from all over the world

D.funded entirely by the gas and oil industry

答案

参考答案:B

解析: 细节题型。 参看第二段第一句…the first detailed global investigation of the ocean bottom.

单项选择题
完形填空
阅读下面短文,掌握其大意,然后从21~40各题所给的A、B、C和D项中,选出最佳选项,并在答题卡上将该项涂黑。
When I was a law professor, a student reported that I made an error in grading his exam by giving him too many points. He was         and after thanking him for his honesty, I changed the          in my records. His beaming (欢笑的) face turned to         “You’re lowering my grade?” he said angrily. “I would never have come in          ……”
He didn’t finish the          but it was obvious that his display of honesty was false. He thought he’d have it all—praise and the          grade.
Several colleagues thought I should have let the higher grade stand        all I’d accomplished was to discourage him from being         in the future. And every time I tell this         , some people agree with this remark.
But I can’t see how I could give good          for worsening my mistake in grading by undermining (损害) the honesty of all my grades by failing to          an error. The grade itself would be a dishonest reflection of his          and it would have been         to other students. How could I possibly give a          a gift of an unearned grade?
I know voluntarily reporting an error in one’s favor is         , but, like          extra change, it’s the         thing to do. People with real honesty, hate to give up benefits as mush as anyone else. The difference is that for them a good conscience and reputation is reward enough to give reason for the cost of doing the right thing.
Perhaps         the student’s grade did discourage him from being honest in the future, but bribing (贿赂) him to be honest so that he does the right thing when it’s cost-free would have         him even more. The duty to be honest is         right and wrong, not risks and rewards.
小题1:
A.wiseB.rightC.rigidD.angry
小题2:
A.fileB.noteC.nameD.grade
小题3:
A.griefB.shockC.happinessD.careless
小题4:
A.whetherB.whichC.ifD.what
小题5:
A.sentenceB.wordC.examD.lesson
小题6:
A.higherB.lowerC.moreD.less
小题7:
A.suchB.because C.soD.whether
小题8:
A.braveB.adventurousC.honestD.successful
小题9:
A.manB.storyC.wayD.exam
小题10:
A.reasonB.causeC.excuseD.result
小题11:
A.makeB.findC.avoidD.correct
小题12:
A.reactionB.senseC.signD.knowledge
小题13:
A.unfairB.cruelC.toughD.funny
小题14:
A.peopleB.teacherC.studentD.worker
小题15:
A.activeB.oftenC.unusualD.curious
小题16:
A.receivingB.returningC.earningD.paying
小题17:
A.manyB.wellC.badD.right
小题18:
A.lowering B.influencing C.protect ingD.separating
小题19:
A.ruinedB.encouragedC.improvedD.blamed
小题20:
A.inB.afterC.about D.during