英语短文有几个问题 大家麻烦看看

题目

英语短文有几个问题 大家麻烦看看
In fact it would be an assistance to all carnivores though it would be a two-edged weapon when they fought each other.1 But ,of the vertebrates,unpredictable nature selected only snakes and one lizard.2One wonders also why nature,3with some snakes ,concocted poison with such extreme potency.In the conversion of saliva into poison,one might suppose that a fixed process took place.4It did not.Some snakes manufactured a poison different in every respect from that of5 others,as different as arsenic is from strychnine and having different effects.One poison acts on the nerves,the other on the blood.1but 为什么后边加个逗号再加个of 2one是个代词代指什么3with some snake在这里做什么成分是什么意思4it did not 5others 代指什么

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