单选题：Paragraph 4 ________.
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TThe optical mouse is superior to the basic one in that the
TThe optical mouse is superior to the basic one in that the former has no moving
According to the author, general computer users need not to
According to the author, general computer users need not to know how the compute
回答第9空。
回答第9空。
对本届奥运会所有奖牌获得者进行了尿样化验，没有发现兴奋剂使用者。如果以上陈述为假，则以下哪项一定为真?（ ）I.或者有的
对本届奥运会所有奖牌获得者进行了尿样化验，没有发现兴奋剂使用者。如果以上陈述为假，则以下哪项一定为真?（ ）I.或者有的奖牌获得者没有化验尿样，或者在奖牌获得者
Which of the following statements is meant by the writer?
Which of the following statements is meant by the writer?