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【单选题】
（ ）的昆虫是前翅1对，后翅特化为平衡棒。A.
双翅目
B.
膜翅目
C.
直翅目
D.
缨翅目
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举一反三
【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.
【简答题】真题练习 4 From: Mary To: Mr. Gary White, HR Manager Subject: Recruitment Date: May 5, 2011 Dear Mr. White, I’ve collected the data of new staff each department needs. I’m going to draft a want ad which h...
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