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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热门试题

单项选择题

What does pain threshold mean as used in the passage

A．The tensity of pain that one can endure.
B．The test of the tensity of pain.
C．The amount of endorphin release.
D．The dose of pain to keep one conscious.

单项选择题

According to Alison Gray, which of the following factors influences one's experience of pain caused by a cut in arm

A．The release of endorphin in the arm.
B．How serious the wound is.
C．One's health condition when his arm was wounded.
D．One's mental state when he had his arm cut.