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【单选题】
Which of the following, if true, most supports the mouthwash company's defense that its advertisement promotes greater public health?A.
Since the dental floss company is protesting the advertisement only to protect its own economic self-interest, it cannot be seen as representing greater public health.
B.
Greater public health is best served if people use both mouthwash and dental floss, a combination that has been shown to be more effective than either method used alone.
C.
Many people object to flossing because it is painful and causes their gums to bleed.
D.
Since, on average, people are twice as likely to use mouthwash regularly as to floss regularly, the advertisement will increase the number of people who take effective action against gum disease, a serious public health problem.
E.
Gum disease has been proven to have links with the early onset of heart disease, one of the top three threats to public health in terms of mortality.
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举一反三
【单选题】在燃油系统控制系统中,当发动机的转速超过系统设定的最高转速时,系统将 ( ),来达到保护发动机目的。
A.
切断喷油
B.
切断点火
C.
同时切断点火和喷油
D.
减小点火提前角
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