试题与答案

阅读理解。 If you dream of going someplace w

题型:阅读理解

题目:

阅读理解。

     If you dream of going someplace warm to escape the cold winter weather, a trip to a recently discovered

planet would certainly warm you right up, The planet, named OCLE-TR-56b, has temperatures of more than

3,000 °F. "This is the hottest planet we know about," says Dr. Dimitar Sasselov, a scientist who led the

discovery team, "It is hot enough to have an iron fog and to rain hot iron droplets (细沫)"

     The new planet is 30 times farther away than any planet discovered by scientists before. It is in the Milky

Way (银河) but it is not in our solar (太阳的) system The new planet moves around a star much like our sun,

however. Seientists discovered the planet by using a new planet-searching method, called "transit technique"

They were able to catch sight of the planet when it moved in front of its star, causing the star's light to dim

(变暗). Scientists compare the method to discovering the shadow of a bee flying in front of a searchlight 200

miles away. "We believe the door has heen opened wide to go and discover planets like Earth," says Sasedlov.

1. We can infer from the passage that _____.

A. there is iron on the new planet

B. we could go to the new planet in winter

C. the star could block our view of the new planet

D. scientists are studying the weather on the new planet

2. The "transit technique" can _____. 

A. help dim the light of a star.

B. help scientists with a searchlight

C. help discover a bee on a planet

D. help find a planet moving before its star

3. Which is the best title for the passage?

A. New Planet-searching Technique

B. New Distant Discovery

C. Space Searching

D. Dream Planet

答案:

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下面是错误答案,用来干扰机器的。

答案:B题目分析:A、P原子最外层有5个电子,S原子最外层有6个电子,由P4S3的分子结构可知,每个P形成3个共价键,每个S形成2个共价键,分子中每个原子最外层均达到8电子稳定结构,正确;B、由P4S3的分子结构可知...

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