在某固定容积的密闭容器中充入1molA，一定条件下建立如下化学平衡：aA(g)
bB(g)+cC(g)，在温度不变的条件下，再充入一定量的A物质。下列说法正确的是[ ]
A.在建立新平衡的过程中，A分解的速率与B消耗的速率之比为a：b
B.在建立新平衡的过程中，混合气体的密度逐渐减小
C.重新达到平衡时，A的转化率一定增大
D.若a=b+c，重新达到平衡时，B的体积分数不变
答案：D
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| Many children act in TV shows. They work several hours every day, 1 they can't go to regular 2 . How do they get their schooling? In Hollywood, about forty 3 give lessons for the children. Their work is very 4 . They make sure that the child 5 many different subjects. They make sure, 6 , that the child gets enough 7 and play. Children in Hollywood must attend classes twenty 8 each week. If not, they can't 9 in TV shows any longer. TV children are usually 10 pupils, and most of their teachers 11 this kind of work. They give the pupils 12 in many interesting 13 . Sometimes the "classroom" is a Mississippi 14 . Sometimes it is the inside of a spaceship. Often the pupils become 15 stars. | ||||
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