A:形成以道德为支撑、法律为保障的社会信用制度
B:凡不符合市场准入规则的企业、商品,均不允许进入市场
C:国家的宏观调控
D:禁止各种形式的地方保护、非法垄断及其他非法竞争行为
(Ⅰ)证明:A1C1=AB1;
(Ⅱ)若AC⊥AB1,∠BCC1=120°,AB=BC,求二面角A﹣A1B1﹣C1的余弦值.
—The cake smells ___________ bad.
—It goes ___________ easily if you don't keep it in the fridge.
What made the children ____ (laugh) loudly?