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  3. By introducing the theory of red giant, the author intends to ______ Which of the following is true of the text?

By introducing the theory of red giant, the author intends to ______ Which of the following is true of the text?

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问题 By introducing the theory of red giant, the author intends to ______
Which of the following is true of the text?
选项 A、There are more than two types of red giants.
B、Carbon-rich star releases carbon when it dies.
C、Stardust mainly consists of carbon, iron and silicon.
D、Star reposes during the process of death.
答案B
解析 为推理判断题。文中说只有两种red giants，故选项A不恰当。从第3段可以得出B正确。C是科学家的一种假设，并且经过证明这种假设并不成立，应排除。D项与文意相反，文中说pulsations(脉冲震动)occurred when stars die，而不是repose(静止)。
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