One question per day; those who answer correctly receive 5 wealth points, and those who participate receive 2 wealth points； Question 270

2016-03-22View Original

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Selection: Polyethylene used in industry is a plastic; polypropylene is also a plastic. What is obtained by copolymerizing ethylene and propylene using conventional methods? A、Plastic B、Rubber C、Chemical fiber D、Coating B、Rubber

Reply #22016-03-22

B、Rubber~~~~~~~~

Reply #32016-03-22

Polyethylene used in industry is a plastic, polypropylene is also a plastic; what is obtained by copolymerizing ethylene and propylene using conventional methods is (C). A、Plastic B、Rubber C、Chemical fiber D、Coating

Reply #42016-03-22

Polyethylene used in industry is a plastic, polypropylene is also a plastic; what is obtained by copolymerizing ethylene and propylene using conventional methods is (B). A、Plastic B、Rubber C、Chemical fiber D、Coating Called EPDM rubber

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One question per day; those who answer correctly receive 5 wealth points, and those who participate receive 2 wealth points； Question 270

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