单项选择题

Passage Two
Questions 30 to 32 are based on the passage you have just heard.

A. Colds.
B. Mental diseases.
C. Changes in blood pressure.
D. Increased general medical practice attendance.
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单项选择题
Why did the scientists scent the room with only a few sprays of Windex in the experiment
A. Because they wanted to rule out other explanations for people’s behavior.
B. Because they didn’t want the subjects to notice the smell.
C. Because Windex is poisonous.
D. Because they would like to keep the room clean.
单项选择题
A. The online program is more convenient. B. The online program costs less. C. The online program requires high technology. D. The online program offers no supervision for a person’s study.
A. The online program is more convenient.
B. The online program costs less.
C. The online program requires high technology.
D. The online program offers no supervision for a person’s study.
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