新概念4 第20课 第2段
In the conversion of saliva into poison, one might suppose that a fixed process took place. It did not; some snakes manufacture a poison different in every respect from that of others, as different as arsenic is from strychnine, and having different effects. One poison acts on the nerves, the other on the blood.

其中，as different as arsenic is from strychnine, and having different effects.
在句中，作什么成分，修饰什么？

看了不少解析，说法各异。这个语法知识点，争议挺大的
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FROM 114.253.13.*