W: Yes, for the first time ever the scientific community has established the existence of planets outside our own solar system. Of course we knew that certain distant stars existed. But only recently did we learn that several of them are orbited by their own planets.
M: Why did it take so long to locate these planets?
W: You have to understand that they are a billion times dimmer than their parent stars. It would be like trying to see the light of a candle next to a huge explosion.
M: But the astronomers didn't see the planets through a telescope, how did they find them?
W: By a very indirect method which cannot be described here with one or two words.
M: There is a powerful new telescope being built in Arizona. Will that help them see these planets?
W: They should be able to see them at least in the form. of small spots of light, and then the scientist will be able to break down and analyze this light. By doing this, they hope to learn about the chemical composition of these planets.
M: I'm looking forward to hearing more when the telescope is in operation. And I'm sure our readers will be interested in it, too.
What is the purpose of the reporter to have the interview?
A.To gather information for the astronomy class.
B.To de some research work on space technology.
C.To report finds from an astronomy conference.
D.To learn about the latest development in astronomy.
第6题
当在雷达天线基座平台上安装避雷针时,避雷针根数()。
A.不应少于2支
B.不应少于3支
C.不应少于4支
D.视情况而定
第8题
A.彩灯线与高压线的水平或垂直距离不应小于1.5m
B. 彩灯线与高压线的水平或垂直距离不应小于1m
C. 架空彩灯线跨越街道的导线截面铜芯不小于2.5mm2
D. 架空彩灯线跨越街道的导线截面芯不小于铝芯不小于2.5mm2
E. 彩灯线最低弧垂与地面距离不应小于6m
第9题
洪水来临时,不要惊慌失措、大喊大叫;不要接近或攀爬电线杆、高压线铁塔;不要爬到泥坯房房顶上。()
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