单项选择题

Ammonia, one of the earliest known nitrogen compounds,was originally produced by distilling organic materials.

A．masses
B．fabrics
C．substances
D．liquids
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单项选择题
In the United States,the national flag is usually displayed outdoor between sunrise and sunset.
A．stored
B．folded
C．respected
D．exhibited
单项选择题
Which of the following statements is true according to the passage______
A．20% of women got sexually abused in their childhood.
B．25%-50% of all children were reported to have been physically abused.
C．25%-50% of children were psychologically abused.
D．60%-75% of children were neglected by their parents.
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