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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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【单选题】双打中，当进攻方球员的进攻没有效果或者进攻质量不好被对方反击时，两个人需要立刻进入左右防守站位。这个轮转最基本的规律是（ ）
A.
就近防守
B.
就远防守
C.
正手位防守
D.
反手位防守
【简答题】穿()西装，不管在什么场合，一般都要将扣子全部扣上． B．三粒扣 A．两粒扣 D．双排扣 C．单排扣
【简答题】双排扣( ) 三粒扣( ) 两粒扣( ) 一粒扣( )