【单选题】关于细胞生长因子(细胞因子)的表述,下列哪个是错误的?
A.
绝大多数细胞因子是低分子量( 15 ~ 30 kD )的蛋白或糖蛋白
B.
细胞因子可以旁分泌、自分泌或内分泌的方式发挥作用
【单选题】Go______ the glass door, turn right, and you’ll be in the hall.
【单选题】— _____ for the glass! — It's OK. I'm wearing shoes. [ ]
【单选题】— for the glass! — It's OK. I'm wearing shoes. [ ]