When Aa spider catches an insect, it releases some poison Binto an insect with its fangs, but the poison of most spiders Cis Dha

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问题 When Aa spider catches an insect, it releases some poison Binto an insect with its fangs, but the poison of most spiders Cis Dharmless to man.

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答案B

解析 改为into the insect,前文提到了all insect,这里重复表达应使用定冠词the。
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