单项选择题

Questions 19 to 22 are based on the conversation you have just heard.

A. The amount of skin affected by the cut.
B. The cause of the cut.
C. The amount of bleeding.
D. The number of nerve endings irritated.
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单项选择题
A. Cold and wet are not responsible for catching colds. B. No one caught a cold even they were kept cold and wet. C. A cold virus caused a cold in volunteers. D. h was easier to catch a cold indoors in winter.
A. Cold and wet are not responsible for catching colds.
B. No one caught a cold even they were kept cold and wet.
C. A cold virus caused a cold in volunteers.
D. h was easier to catch a cold indoors in winter.
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