单项选择题

Questions 23 to 25 are based on the conversation you have just heard.

A．Call room service.
B．Come to the reception desk.
C．Both Ａ) and Ｂ).
D．Go to the canteen.
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单项选择题
A．Gases have been heated to a temperature of multimillion-degree.B．Gases have been drawn to the black hole at a very high speed.C．Gases have been tearing apart by the black hole.D．Gases have been sucked by the black hole.
A．Gases have been heated to a temperature of multimillion-degree.
B．Gases have been drawn to the black hole at a very high speed.
C．Gases have been tearing apart by the black hole.
D．Gases have been sucked by the black hole.
填空题
All the 9,500 women who participated in the research would have little exercises or would only walk just a mile a day before the research.
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