______ are chiefly derived from petroleum.A、Plastics todayB、There are plastics

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问题 ______ are chiefly derived from petroleum.

选项 A、Plastics today
B、There are plastics today
C、Because today plastics today
D、Due to plastics today

答案 A

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______arechieflyderivedfrompetroleum.A、PlasticstodayB、Thereareplastics