题干
— The exam is coming!
— Yes. Our teacher often tells us we can't be _______ careful while taking exams.
A：too
B：very
C：quite
D：so
答案(点此获取答案解析）
A
3C(气), 在一定的条件下, 使一定量A和B气体反应, 达到平衡状态时, 具有的性质是: ( )
