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5.若a+b<0,ab<0,則()A a>0,b>0 B a<0,b<0 C a,b兩數一正一負,且正數的絕對值大於負數的絕對值
D a,b兩數一正一負,且負數的絕對值大於正數的絕對值
6.某糧店出售的三種品牌的麵粉袋上分別標有質量為(25±0.1)kg,(25±0.2)kg,(25
±0.3)kg的字樣,從中任意拿出兩袋,它們的質量最多相差()
A 0.8kg B 0.6kg C 0.5kg D 0.4kg
5.若a+b<0,ab<0,則()A a>0,b>0 B a<0,b<0 C a,b兩數一正一負,且正數的絕對值大於負數的絕對值
D a,b兩數一正一負,且負數的絕對值大於正數的絕對值
6.某糧店出售的三種品牌的麵粉袋上分別標有質量為(25±0.1)kg,(25±0.2)kg,(25
±0.3)kg的字樣,從中任意拿出兩袋,它們的質量最多相差()
A 0.8kg B 0.6kg C 0.5kg D 0.4kg
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