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1、19春阅读（IV）作业3-0001试卷总分:100 得分:100一、 单选题 (共 25 道试题,共 100 分)1.In an Indianapolis neighborhood where some teenage girls flaunt pregnancies like new hairdos, Aisha Fields is unabashedly square: She plans to abstain from sex until she marries. Most of my friends already have babies, says Aisha, a high sch
2、ool junior and abstinence mentor. Being pregnant is a fashion. Girls go around bragging:Im three months (pregnant). They think its cool. With 1 million US teens becoming pregnant every year, and 13 percent of all American babies born to teens, Aishas just-say-no attitude is a policymakers dream come
3、 true. Federal and state officials are banking on such an attitude as they launch a new campaign to shrink the ranks of unwed teenage moms. On Oct. 1, the government will begin dispensing some of the nearly $850 million earmarked under the welfarereform law over five years for teaching abstinence an
4、d preventing out-of-wedlock births. But experts say there is no research to suggest that abstinenceonly education will succeed. In contrast, more comprehensive programs that cover contraception, family planning, and communication skills can help delay sexual involvement by teens, according to a stud
5、y by the National Campaign to Prevent Pregnancy in Washington. It seems foolish to be tossing away all this money without knowing whether it will work, says Lisa Kaeser, a senior associate at the Alan Guttmacher Institute, a Washington-based nonprofit group that researches reproductive health. But e
6、xperts agree the latest campaign against teen pregnancy marks a big improvement over older policies in one fundamental respect: It emphasizes prevention. Question:Lisa Kaisers attitude towards the National Campaign to Prevent Teen Pregnancy is _.A.affirmativeB.negativeC.doubtfulD.prudent正确答案:D2.To c
7、reate a supercell, take a storm where wind speed increases with height, while wind direction veers; a situation in which updraughts and downdraughts within the thunderstorm can support each others existence rather than cancel each other out. It is as winds blow into this turbulent region from three
8、to five kilometers up that a low-pressure section of the storm may begin to rotate. The rotation of this part of the storm (known as a mesocyclone) causes the air pressure to fall some more, prompting wind lower down to flow into the storm and speed up upwards. This creates a spinning updraught whic
9、h high-level winds in the storm can boost in the same way that wind blowing across the top of a chimney does wonders for drawing up an open fire. Youre not yet looking at a tornado, though if youre watching this particular storm develop you might start looking for a getaway car especially if the sto
10、rm begins to change shape. When mid-to upper-level winds upwind of the storm encounter the supercell, some are forced to detour round it. They converge again downwind, moulding the storm clouds into an ominous anvil-shape in the process. But while some wind goes round the mesocyclone, some runs full
11、 square into this meteorological brick wall and is forced downward, creating a rear flank downdraught (RFD) which many experts believe is what makes or breaks a tornadic storm. Its when an RFD tries to swing around the base of the storm, narrowing the area of wind flowing into the updraught and incr
12、easing its spin (in the same way figure skaters when their arms are pulled in) that you might want to get into your getaway car. If youre anywhere beneath whirling piece of meteorological give and takea funnel cloudyou are in a bad, dangerous place known to stormchasers as the bear cage. Its where,
13、if the funnel cloud sticks around long enough for the updraught to touchdown on terra firma, you will find yourself on the inside of a tornado. Question:What can be inferred from the third paragraph?A.If an updraught is created, tornado appears.B.A tornado comes into being when a RFD is created.C.RF
14、D is created if winds go round the mesocyclone.D.When meeting supercell, winds will blow in all directions.正确答案:B3.He stood waving until the train was out of _.A.sightB.glimpseC.sceneD.reach正确答案:A4.Young people should have the right to control and direct their own learning, that is, to decide what t
15、hey want to learn, and when, where, how, how much, how fast, and with what help they want to learn it. To be still more specific, I want them to have the right to decide if, when, how much, and by whom they want to be taught and the right to decide whether they want to learn in a school and if so wh
16、ich one and for how much of the time. No human right, except the right to life itself, is more fundamental than this. A persons freedom of learning is part of his freedom of thought, even more basic than his freedom of speech. If we take from someone his right to decide what he will be curious about, we destroy his freedom of thought. We say, in effect, you must think not about what interests an
