B) account for
C) originate from
D) descend from
We all have offensive breath at one time or another. In most cases, offensive breath emanates from bacteria in the mouth, although there are other more causes. Until a few years ago, the most doctors could do was to counsel patients with bad breath about oral cleanliness. Now they are finding new ways to treat the usually curable condition.
文章中的并列关系怎样对付阅读的长句
小的并列:成分并列,不容易出题。如果出题,选项应该概括所有并列成分,否则是错误选项。
大的并列:只出一题,应该提纲挈领。
What has the telephone done to us, or for us, in the hundred years of its existence? A few effects suggest themselves at once. ①It has saved lives by getting rapid word of illness, injury, or fire from remote places. ②By joining with the elevator to make possible the multistory residence or office building, it has made possible - for better or worse - the modern city. ③By bringing about a great leap in the speed and ease with which information moves from place to place, it has greatly accelerated the rate of scientific and technological changes and growth in industry. Beyond doubt ④it has seriously weakened if not killed the ancient art of letter writing. ⑤It has made living alone possible for persons with normal social impulses; by so doing, it has played a role in one of the greatest social changes of this century, the breakup of the multi-generational household. ⑥It has made the war chillingly more efficient than formerly. Perhaps, though not provably , it has prevented wars that might have arisen out of international misunderstanding caused by written communication. Or perhaps - again not provable - by magnifying and extending irrational personal conflicts based on voice contact, it has caused wars. Certainly it has extended the scope of human conflicts, since it impartially disseminates the useful knowledge of scientists and the nonsense of the ignorant, the affection of the affectionate and the malice of the malicious.
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