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: Well, 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. We don't currently have a telescope that can be used to see them.
M: But if the astronomers didn't see the planets through a telescope, how did they find them?
W: By a very indirect method. The astronomers measured subtle distortions in the frequency of the light from the parent stars and observed that some of the stars seem to rock back and forth. They determined that this was caused by gravitational pull from orbiting planets.
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 scientists will be able to break down and analyze this light. By doing this, they hope to learn about the chemical composition of these planets--oxygen and ozone molecules, for example, would be telltale signs of life on these planets.
M: I'm looking forward to hearing more when the telescope is in operation. And I'm sure our readers would be interested too.
(20)
A.The possible existence of life on other planets.
B.A technical problem that astronomers can't solve.
C.Methods for building powerful new telescopes.
D.The discovery of planets orbiting distant stars.
第1题
下列不属于现代商业保险的要素内容的一项是()。
A.可保风险的存在
B.保险费率的厘定
C.保险合同的订立
D.保险结果的赔付
第2题
保险的要素是指进行保险经济活动应具备的基本条件。下列属于现代商业保险要素的是()。
Ⅰ.可保风险存在 Ⅱ.大量同质风险的集合与分散
Ⅲ.保险费率厘定 Ⅳ.保险合同的订立 Ⅴ.保险准备金的提取与结转
A.Ⅰ、Ⅱ、Ⅲ、Ⅳ、Ⅴ
B.Ⅰ、Ⅱ、Ⅲ、Ⅴ
C.Ⅱ、Ⅲ、Ⅳ、Ⅴ
D.Ⅰ、Ⅱ、Ⅲ
第8题
现代商业保险的要素包括()
A.可保风险的存在
B.保险风险的集合与分散
C.保险费率的厘定
D.以上皆是
第9题
现代商业保险的要素包括()
A.可保风险的存在
B.保险风险的集合与分散
C.保险费率的厘定
D.以上皆是
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