安庆石化出售的三种品牌的化肥袋上分别标有质量为(40±0.1)kg.(40±0.2)kg.(40±0.3)kg的字样.从中任意取出两袋.它们的质量最多相差 [ ] A． 0.8 kg B． 0.6 kg C． 0.5 kg D． 0.4 kg 题目和参考答案——青夏教育精英家教网—

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安庆石化出售的三种品牌的化肥袋上分别标有质量为(40±0.1)kg、(40±0.2)kg、(40±0.3)kg的字样，从中任意取出两袋，它们的质量最多相差
[　　]
A．	0.8 kg
B．	0.6 kg
C．	0.5 kg
D．	0.4 kg

答案：B
解析：

从条件中可以看出，在三种化肥中，最多可以超出标准质量0.3 kg，最低低于标准质量0.3 kg，所以从中任意取出两袋，它们的质量最多相差0.6 kg，所以答案为B．

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