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治疗绿脓杆菌感染选用（）.
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B 根据下面短文回答下列问题。 Many children want to buy computers because they like to play computer games. But they don’t know that playing computer games for a long time is bad for their eyes. If we look round, we can see many children begin to wear glasses when they are six or seven years old. So parents and teachers should tell those children not to play at the computers for a long time. Computers are very useful and computer games are very interesting but we should take good care of our eyes. Everybody should take good care of his/her eves.
根据《药品广告审查发布标准》 处方药广告的忠告语是（）
真性红细胞增多症会出现
大气污染物CO2对环境的主要影响
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