When collecting insect specimens, if you catch a butterfly, you must first () a. put it in a poison bottle b. put it in a triangular paper bag c. put it on the wing.

The general process of making insect specimens is as follows:

(1) Collect insects caught with insect nets and put them in triangular paper bags.

(2) Poisonous insects should be put into poison bottles to kill after being caught.

(3) Take the poisonous insect out of the poison bottle with the needle and insert it with the insect needle (or needle).

(4) Spreading wings When making butterfly, moth and dragonfly specimens, spread wings with spreading wings.

5) Preservation: Insect specimens are usually preserved in special specimen boxes. After the dried specimens are put into the box, insect repellents such as camphor and desiccant are usually placed in the corner of the box, and labels with insect name, collection place, collection time, collector and specimen producer are also needed.

Therefore, when collecting insect specimens, if butterflies are caught, they should be put into triangular paper bags first.

So choose: B.

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