小轩同学在“探究凸透镜成像规律”的活动中，选用了焦距未知的凸透镜。
北方地区矿产资源十分丰富，主要有（ ）
①煤炭 ②有色金属 ③石油 ④铁矿 ⑤天然气
He won the match because he took the advantage of his height.
______ Lily ____ Lucy may go with you because one of them must stay at home.
下列词语中划线字的注音有误的一项是（ ）
