胆汁酸的作用是()
A. 复合物
B. 乳化
C. 溶解
D. 不沉淀
以下属于类脂的有( )
A. 胆固醇
B. 胆固醇酯
C. 卵磷脂
D. 脑磷脂
E. 三酰甘油
Watch the video clip and answer thequestions.1.According to the video clip, which city is the greenest onein Asia?
According to the video clip, what makes Copenhagen thetop one eco-friendly city in the world?