Drivers should always remember that () is the most important thing.(safe)

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• Children should remember,"___(safe)is the most important thing."
• Drivers should always remember that () is the most important thing.(safe)
• Children should remember,"___(safe)is the most important thing."
• Drivers should always remember that () is the most important thing.(safe)
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• 如图，在注射器中加入少量Na2SO3晶体，并吸入少量浓硫酸（以不接触纸条为准）.则下列有关说法正确的是（　　） A.蓝色石蕊试纸先变红后褪色 B.品红试纸、沾有KMnO4溶液滤纸均褪色证明了S