题目内容：

蜘蛛spider 蚂蚁ant 蜜蜂bee 蝴蝶butterfly 蜻蜓dragonfly是昆虫!

优质解答

Ant,bee,butterfly,dragonfly are insects. An insect must have 6 legs.Some arthropods with five pairs of legs are not insects ,such as spider and scorpion.