【多选题】每次更换标准缓冲液或供试品溶液前对电极应怎样操作
【简答题】用所给词的适当形式填空。 1. There a book and two pencils on the desk.( be) 2. How many are there in your community? (clothes shop) 3. What about kites this afternoon? ( fly) 4.Lily's seat is behind ( I ) 5. Tianj...
【单选题】中性粒细胞受损后并发脂肪变性,胞浆中出现
【单选题】He has two pencils, _____ was given by his brother as a birthday present.
【简答题】(本题满分14分) 某甜品店制作蛋筒冰淇淋,其上半部分呈半球形,下半部分呈圆锥形(如图)。现把半径为10cm的圆形蛋皮分成5个扇形,用一个扇形蛋皮围成锥形侧面(蛋皮厚度忽略不计),求该蛋筒冰淇淋的表面积和体积(精确到0.01)