--I wasn’t very outgoing, was I? --__________. You used to be really quiet. A. No, you weren’t B. Yes, you were C. Yes, you weren’t D. No, you were 答案:A右图标出的是有关热水瓶的组成物质,请回答下列问题.(1)所标物质中为金属材料的是 (写一种即可),为有机合成材料的是 .(2)可用厨房中的一种常用物质(写名称) 除去瓶胆内壁的水垢(已知水垢的主要成分是CaCO3).