高聚物• •--CH2—CH2—CH2-• •是用下列何种物质聚合而成的： A．CH

高聚物• •--CH₂—CH₂—CH₂-• •是用下列何种物质聚合而成的：

A．CH₃-CH₃ B．CH₃-CH₂-CH₃ C．CH₂=CH-CH₃ D．CH₂=CH₂

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高聚物• •--CH2—CH2—CH2-• •是用下列何种物质聚合而成的： A．CH

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