单项选择题

According to the passage, nurses in the United States in the 1850's could best be described as （）

A．poor, untrained women
B．young medical students
C．wives of military officers
D．middle-class men and women

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单项选择题
According to the passage wind is（）

A．moving air
B．lighter clouds
C．air pressure
D．cold air
单项选择题
It can inferred from the passage that a storm is carded by （）

A．light winds
B．clouds
C．high winds
D．loud sounds
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