鱼子MM,
If and only if the landfill’s capacity to hold liquids is exceeded does the leachateescape into the environment 是充分必要条件, 无论怎么逆, 否都是对的.
E相当于是If and only if the landfill’s capacity to hold liquids is exceeded does the leachateescape into the environment 的同意替换, 相当于假设, 当然可以是infer的答案.
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D不对,是因为题目是infer,需要“推断出来”,D是明示。
还有费费把plants翻译为“植物”,不对,应该为“工厂”
If and only if the landfill’s capacity to hold liquids is exceeded does the leachate escape into the environment
不是应该leachate escape ——>exceeded么?
那逆否命题不就应该 not exceeded——>not leachate escape么?
E不是啊
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