When making landfall at night,you can determine if a light is a major light or an offshore buoy by().
A . the intensity of the light
B . checking the period and characteristics against the Light List
C . the color,because the buoy will have only a red or a green light
D . Any of the above can be used to identify the light
时间:2022-10-11 07:32:18
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此题为多项选择题。
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听力原文:Italian scientists have raised new health concerns about the safety of using mobile phones, with research showing radio waves from the handsets makes cancerous cells grow more aggressively. When Fiorenzo Marinelli and his colleagues at the National Research Council in Bologna exposed leukemia cells in the laboratory to 48 hours of continuous radio waves they initially killed the cancer cells but then made the surviving tumor cells replicate more rapidly.
We don't know what the effects would be on healthy human cells, Marinelli told New Scientist magazine. In the Italian study, after 24 hours 20 percent more leukemia cells died than healthy cells but longer exposure to the radio waves triggered genes in the surviving cancer cells to divide aggressively.
The results of the study do not show any direct threat to human health but they support the belief of some scientists who say radiation can damage DNA and destroy the cell repair system, thus making tumors more deadly. But animal studies, including recent research by Australian scientists at the Institute of Medical and Veterinary Science in Adelaide, have shown that radiation from mobile phones does not trigger the growth of tumors.
The WHO (i.e., The World Health Organization) has called for more research into the potential health hazards of mobile phones and has urged people to limit their use of them. A British government inquiry, which concluded that there was no evidence that mobile phones are a danger to health, has advised parents to discourage their children, whose brains are still developing, from using them excessively.
What is the speaker's main topic?
A.Effects of using mobile phones on healthy human cells.
B.Risks of developing cancer involved in the use of mobile phones.
C.Damage to healthy cells caused by the use of mobile phones.
D.The potential health hazards of mobile phones on humans.
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We can make mistakes at any age. Some mistakes we make are about money. But most mistakes are about people. "Did Jerry really care when I broken up with Helen?" "When I got that great job did Jim really feel good about it, as a friend?" "Or did be envy my luck?" "And Paul-- why didn't I pick up that he was friendly just because I had a car?" When we look back, doubts like these can make us feel bad. But when we look back, it's too late.
Why do we go wrong about our friends or our enemies? Sometimes what people say hides their real meaning. And if we don't really listen, we miss the feeling behind the words. Suppose someone tells you, "You're a lucky dog." Is he really on your side? If he says, "You're a lucky guy" or "You're a lucky gal," that's being friendly. But "lucky dog" ? There's a bit of envy in those words. Maybe he doesn't see it himself. But bringing in the "dog" bit puts you down a little. What be may be saying is that be doesn't think you deserve your luck.
"Just think of all the things you have to be thankful for" is another noise that says one thing and means another. It could mean that the speaker is trying to get you to see your problem as part of you life as a whole. But is he? Wrapped up in this phrase is the thought that your problem isn't important. It's telling you to think of all the starving people in the world when you haven't got a date for Saturday night.
How can you tell the real meaning behind someone's words? One way is to take a good look at the person talking. Do his words fit the way he looks? Does what he says square with the tone of voice? His posture? The look in his eyes? Stop and think. The minute you spend thinking about the real meaning of what people say to you may save another mistake.
Note: guy = boy; gal = girl
In paragraph 1, when the writer recalls some things that happened between him and his friends, ______.
A.he feels happy, thinking of how nice his friends were to him.
B.he feels he may not have "read" his friends' true feelings correctly.
C.he thinks it was a mistake to have broken up with his girlfriend.
D.he is sorry that his friends let him down.
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We can make mistakes at any age. Some mistakes we make are about money. But most mistakes are about people. "Did Jerry really care when I broke up with Helen? " "When I got that great job, did Jim really feel good about it, as a friend? Or did he envy my luck?" When we look back, doubts like these can make us feel bad. But when we look back, it's too late.
Why do we go wrong about our friends, or our enemies? Sometimes what people say hides their real meaning. And if we don't really listen we miss the feeling behind the words. Suppose someone tells you, "You're a lucky dog." That's friendly. But "lucky dog"? There is a bit of envy in those words. Maybe he doesn't see it himself. But mentioning the "dog" puts you down a little. What he may be saying is that he doesn't think you ought to have your luck.
"Just think of all the things you have to be thankful for" is another noise that says one thing and means another. It could mean that the speaker is trying to get you to see your problem as part of your life as a whole. But is he? Wrapped up in this phrase is the thought that your problem isn't important. It's telling you to think of all the starving people in the world when you haven't got a date for Saturday night.
How can you tell the real meaning behind someone's words? One way is to take a good look at the person talking. Do his words fit the way he looks? Does what he says agree with the tone of voice? His posture (姿态)? The look in his eyes? Stop and think. (47) If you spend one minute thinking about the real meaning of what people say to you, you may avoid another mistake.
This passage is mainly about______.
A.how to interpret what people say
B.what to do when you listen to others talking
C.how to avoid mistakes when you communicate with people
D.why we go wrong with people sometimes
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The author holds that when making decisions, ______.
A.positive information should be focused
B.all options should be carefully diagnosed
C.negative information should be considered
D.maladaptive information should be avoided