BWe can conclude from the passage that（）

A．asteroids racing across the night sky are likely to hit Earth in the near future
B．workable solutions still have to be found to pr a violent coming course of aster olds with the earth
C．the worry about asteroids can be left to future generations since it is unlikely to happen in our lifetime
D．while pushing asteroids off course nuclear weapons would destroy the world

Unless we spend money spotting and pring asteroids now, one might crash into Earth and destroy life as we know, say some scientists.

Asteroids are different forms of the meteoroids that race across the night sky. Most orbits the sun far from Earth and don’t threaten us. But there are also thousands of asteroids whose orbits put them on a violent coming course together with Earth.

Buy $ 50 million worth of new telescopes right now. Then spend $10 mil]ion a year for the next 25 years to locate most of the space rocks. By the time we spot a fatal one, the scientists say, we’ll have a way to change its course.

Some scientists favor pushing asteroids off course with nuclear weapons. But the cost wouldn’t be cheap.

Is it worth it Two things experts consider when judging any risk are: 1) How likely the is; and 2) How bad the consequences if the occurs. Experts think asteroids big enough to destroy lots of life might strike Earth once every 500,000 years. Sounds pretty rare but if one did fall it would be the end of the world. "If we don’t take care of these big asteroids, they’ll take care of us. "Says one scientist. "Its that ."

The cure, though, might be worse than the disease, Do we really want fleets of nuclear weapons silting around on Earth "The world has less to fear from doomsday rocks than from a great nuclear fleet set against them. "Said a New York Times article.

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【单选题】属于基层法律服务工作者解答法律询问原则的是（）。

息讼解纷

有问必答

不公开引用内部规定

不强加于人

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【单选题】面对一系列社区健康问题，以下哪项不是确定优先解决问题的原则

问题的普遍性

问题的严重性

符合成本效益

解决的可行性

问题的综合性

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【单选题】21(). A．reuse B．reread C．rewrite D．recite

For many people today, reading, is no longer relaxation. To keep up their work they must read letters, reports, trade publications, interoffice communications, not to mention newspapers and magazines: a never-ending flood of words. In (21) a job or advancing in one, the ability to read and comprehend (22) can mean the difference between success and failure. Yet the unfortunate fact is that most of us are (23) readers. Most of us develop poor reading (24) at an early age, and never get over them. The main deficiency (25) in the actual stuff of language itself—words. Taken individually, words have (26) meaning until they are strung together into phraseds, sentences and paragraphs (27) , however, the untrained reader does not read groups of wor. He laboriously reads one word at a time, often regressing to (28) words or passages. Regression, the tendency to look back over (29) you have just read, is a common bad habit in reading. Another habit which (30) down the speed of reading is vocalization—sounding each word either orally or mentally as (31) reads.

To overcome these bad habits, some reading clinics use a device called an (32) , which moves a bar (or curtain) down the page at a predetermined speed. The bar is set at a slightly faster rate (33) the reader finds comfortable, in order to "stretch" him. The accelerator forces the reader to read fast, (34) word-by-word reading, regression and subvocalization, practically impossible. At first (35) is sacrificed for speed. But when you learn to read ideas and concepts, you will not only read faster, (36) your comprehension will improve. Many people have found (37) reading skill drastically improved after some training. (38) Charlce Au, a business manager, for instance, his reading rate was a reasonably good 172 words a minute (39) the training, now it is an excellent 1,378 words a minute. He is delighted that how he can (40) a lot more reading material in a short period of time.

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