单项选择题

What is the main purpose of the first paragraph（）

A．To dramatize the diversity of body language.
B．To emphasize the necessity of an excellent command of body language.
C．To highlight the existence of body language.
D．To explain the word "gesture".

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单项选择题

What does the author think of the Americans’ view of their food（）

A．They overlook the risks of the food they eat.
B．They overestimate the hazards of their food.
C．They are overoptimistic about the safety of their food.
D．They overstate the government’s interference with the food industry.

单项选择题

Disaster psychology refers to the study of how to （）

A．avoid human-created disasters
B．cope with human reactions to disasters
C．reduce the worst natural disasters
D．prevent growing terrorism