On the one hand, the Ause of synthetic chemical products is increasing; on the Bcontrast, vegetable oils are Crising in value an

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问题 On the one hand, the Ause of synthetic chemical products is increasing; on the Bcontrast, vegetable oils are Crising in value and Dimportance.

选项 A、 
B、 
C、 
D、 

答案B

解析 Contrast is incorrect in the paired expression on the one hand...on the other hand. Correction: other hand.
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