42.According to the passage,which of the following is NOT true?
A.A black hole can be very tiny but extremely heavy.
B.The gravity of a black hole holds all light in its center.
C.Scientists observe high-energy light through their own eyes.
D.Some small black holes came into being as early as the universe.
答案 C [推理判断题,根据文章的最后一段When a black hole and a star are close together, high-energy light is made. This kind of light cannot be seen with human eyes. Scientists use satellites and telescopes in space to see the high-energy light可知科学家们观察高能量的星星是通过望远镜和卫星观察的,不是用肉眼观察的,故选C。]
43.Which can be inferred from the passage?
A.Every galaxy must have a black hole.
B.A galaxy is the center of the universe.
C.A galaxy consists of a large group of stars and planets.
D.Earth's galaxy is called the Milky Way.
答案 C [推理判断题。根据第五段的Scientists have found proof that every large galaxy contains a supermassive black hole at its center可知选C。]
44.What does the last sentence in Paragraph 5 suggest?
A.Neither the sun nor the earth is as heavy as a black hole.
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