Indicate whether the following statements regarding black ho

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Indicate whether the following statements regarding black holes are true or false.
1.Some black holes at the centers of galaxies have a mass that is a billion times that of our Sun.
2.Most black holes are about the same radius as the Sun.
3.If the Sun suddenly became a black hole,the Earth would be immediately sucked into it.
4.If you looked directly at a black hole,it would appear perfectly black.
5.The distance from the black hole where gravity is so strong that even light cannot escape is called the event horizon or the Schwarzschild radius.
google 翻译如下：
1.一些黑洞在星系的中心有一个质量那是我们的太阳的10亿倍.
2.最黑的洞是太阳的半径相同.
3.如果太阳突然变成一个黑洞,地球将被立即吸了进去.
4.如果你直视着一个黑洞,它会出现完全黑的.
5.距离黑洞的引力是如此之强,即使光也无法逃脱被称为“事件视界的史瓦西半径.

正确如下：
1.一些黑洞在星系的中心有一个质量那是我们的太阳的10亿倍.
5.距离黑洞的引力是如此之强,即使光也无法逃脱被称为“事件视界的史瓦西半径.
其余错误

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