单项选择题

A. Vitamin supplements.
B. Ultraviolet rays.
C. Ten minutes of exercise each day.
D. Eight hours of sleep each night.
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单项选择题
A. They are very sensitive to it. B. They are indifferent about it. C. They feel it is not true. D. They feel it confirms their inferiority.
A. They are very sensitive to it.
B. They are indifferent about it.
C. They feel it is not true.
D. They feel it confirms their inferiority.
单项选择题
A. It was not highly developed. B. It was well established. C. It was the same as that available to men. D. It was only available in the northern states.
A. It was not highly developed.
B. It was well established.
C. It was the same as that available to men.
D. It was only available in the northern states.
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