单项选择题

Mr. Teitelbaum's three-point check involves all of the following EXCEPT ______.

A．the ground
B．the trunk of a tree
C．the helmet
D．the branches and leaves of a tree
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单项选择题
Which of the following is a fact
A．Difficulty in adjusting to changes leads to alcoholism.
B．Nutritional deficiency is a major cause of alcoholism.
C．The rate of alcoholism is low in a group where customs toward drinking are fixed.
D．Man cannot be exempt from physical and social stresses.
单项选择题
According to the passage, which of the following statements is true
A．More than 6% of American adults are alcoholics.
B．60% of Americans drink alcoholic beverages.
C．Less than 7% of American adults who drink are alcoholics.
D．Less than 7% of American adults use alcoholic beverages.
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