题目

已知球为三棱锥的外接球，，则球的表面积是(    ) A.       B.        C.        D. 答案：A词汇运用。根据所给中文意思或提示词，填入适当形式的单词。用方框中所给单词的适当形式填空，每个单词限用一次。be, room, think, they, grandparents1.Miss Lee Anna is a nice girl.2.My bedroom is very clean and tidy.3.---Are these your notebooks? ---No, they’re notebooks.4.They are my sister’s and my mother’s .5.On the desk my clock and some books.