单项选择题

According to the passage, black holes ______.

A．include protons
B．oppose the quantum theory
C．stop anything from escaping
D．give off radiation
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单项选择题
Which of the following is a cause leading to Hawking's divorce
A．He fell in love with one of his nurses.
B．His illness became worse.
C．He does not believe in God.
D．His temper is bad.
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