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.
【语篇解读】 本文主要讲述太空黑洞的形成原因和科学家们如何了解黑洞现象的。
1.The gravity of a black hole may become so strong that light cannot get out when________.
A.the star is going to die
B.special tools are used on it
C.other stars come close to it
D.it is seen from the space telescopes
答案 A
2.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
3.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.
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