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【单选题】
可逆反应aA(g) + bB(g) cC(g) + dD(g)，反应过程中，当其它条件不变时，C的百分含量（C%）与温度（T）和压强（P）的关系如图下列叙述正确的是A.
达平衡后，若升温，平衡左移
B.
达平衡后，加入催化剂则C%增大
C.
化学方程式中a+b＞c+d
D.
达平衡后，减少A的量有利于平衡向右移动
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