题干
—How can Bob's mum reuse the box?
—She can ．
A：make a card with it
B：make a toy with it
C：put her shoes in it
答案(点此获取答案解析）
C
pC（g）达到平衡后，保持温度不变，将气体体积缩小到原来的1/2，当达到新平衡时，C的浓度为原来的1.9倍。下列说法中正确的是