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

It can inferred from the passage that a storm is carded by （）

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

单项选择题

This passage mainly talks about （）

A．it's great fun for people to fly a kite in light wind
B．what is wind
C．high winds are very dangerous
D．people can feel wind, hear wind but can't see wind