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题型:填空题 题类:常考题 难易度:普通
七上科学期中测试精编B卷(1、2章综合)
某同学找到6只昆虫,他依昆虫的外形特征坐了如图甲所示的检索表。
理由是:。
请回答:
1a有脊柱···············P
1b无脊柱···············2
2a身体不分节···········Q
2b身体分节·············3
3a有膜翅···············R
3b无膜翅···············S
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