单项选择题

Questions 8 to i0 are based on the following conversation. At the end of the conversation; you will be given 15 seconds to answer the questions. NOW listen to the conversation. In the process described by the woman, why is the c0al burned

A．To produce a gas containing carbon and hydrogen.
B．To remove impurities from methanol.
C．To heat the reactors.
D．TO prevent dangerous gases from forming.

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单项选择题

What does the man say about children

A．They blush more readily than women do.
B．They’re uncomfortable performing in front of adults.
C．They don’t respond to stress well.
D．They blush less frequently than adults do.

单项选择题

According to the professor, what were, the beliefs of the Greek philosophers based upon

A．How the natural world was described in Greek mythology.
B．What they observed directly.
C．The writings of philosophers from other societies.
D．Measurements made with scientific instruments,

Questions 8 to i0 are based on the following conversation. At the end of the conversation; you will be given 15 seconds to answer the questions. NOW listen to the conversation. In the process described by the woman, why is the c0al burned 您的浏览器不支持 audio 元素。

Questions 8 to i0 are based on the following conversation. At the end of the conversation; you will be given 15 seconds to answer the questions. NOW listen to the conversation. In the process described by the woman, why is the c0al burned