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【简答题】
党参的原植物有( ) A.党参 B.党参 C.川党参 D.西党参 A. 1 B. 1 C. 1 D. 1
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【简答题】Explain the meaning of the term hybridization . State the type of hybridization shown by the carbon atoms in carbon dioxide, [5 marks] diamond, graphite and the carbonate ion.
【单选题】Diamond and graphite are macromolecules.which statement about diamond and graphite is not correct?
A.
They are giant structures with high melting points.
B.
They are non-conductors of electricity.
C.
They contain only atoms of a non-metal.
D.
They have covalent bonds between the atoms.
【简答题】请在第7行添加内容,使得网页上显示hello world 1 2 3 4 制作我的第一个网页 5 6 7 8 9
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