Indeed a lot of skillful methods are used in many advertisements to cheat consumers. Not all ads play tricks on us__________.
A：instead
B：though
C：still
D：anyway
前面3个和后面3个都是1班的学生，1班一共____个。其他同学都是2班的，2班同学一共有____个。小明是____的学生。
下列对细胞有关知识的叙述错误的是（ ）
