假如你在研究中发现一种新的单细胞生物并鉴定该生物的分类,则以下何种特性与你的鉴定有关 ①核膜的有无 ②核糖体的有无 ③细胞壁的有无 ④膜上磷脂的有无
( )—— There isn't _____ water here. Could you get _____ for me? —— All right. A. some, anyB. any, anyC. any, some
( ) There are thirty pupils in our class. _____ of them are young pioneers A. Any B. Either C. All
( ) There _____ two cups of tea on the table. A. isB. areC. was
( )Mrs. Sun is a friend of ______ A. Mary's motherB. mother of MaryC. Mary 's mother's
( ) —— I'm sorry I can't help you. —— ________. A. Not at all. B. You are welcome.C. It doesn't matter.