單項(xiàng)選擇題反應(yīng)器中等溫進(jìn)行著A→P(1)和A→R(2)兩個(gè)反應(yīng),當(dāng)降低A的濃度后,發(fā)現(xiàn)反應(yīng)生成P 的量顯著降低,而R的生成量略降低,表明().

A.反應(yīng)(1)對(duì)A的反應(yīng)級(jí)數(shù)大于反應(yīng)(2)
B.反應(yīng)(1)對(duì)A的反應(yīng)級(jí)數(shù)小于反應(yīng)(2)
C.反應(yīng)(1)的活化能小于反應(yīng)(2)


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