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【单选题】
以下哪种分类方法能够反映植物之间的亲缘关系和演化规律?A.
人为分类法
B.
药用部位分类法
C.
经济分类法
D.
自然分类法
拍照语音搜题，微信中搜索"皮皮学"使用
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【单选题】空气过滤介质除菌机理中,当颗粒与单纤维介质的距离( )时,颗粒与纤维碰撞而被截留。
A.
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B.
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【简答题】听短文，回答问题。 1. Where does John live? [ ] A. He lives near David. B. He lives far away from David. C. He and David live in the same house. 2. What does David help John with? [ ] A. His Maths home...
【简答题】听对话，回答问题。 1. Where does the man live? A. No. 58 Changjiang Street. B. No. 68 Changjiang Street. C. No. 57 Changjiang Street. 2. Where does the woman probably from? A. China. B. Cermany. C. Beijing. 3....
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【单选题】空气过滤介质除菌机理中,当颗粒与单纤维介质的距离( )时,颗粒与纤维碰撞而被截留。
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