题干
— Shall I buy this comic book for Dick?
— . He might already have it.
A：No problem
B：I don't agree
C：You can't do that
D：You'd better not
答案(点此获取答案解析）
D
xC（g）+2D（g），当反应达到平衡时，生成0．4 mol D，并测得C的平衡浓度为0．4 mol/L，下列叙述中不正确的是（ ）。
