题目

下图为某学生进行某实验的基本操作步骤，下列相关表述正确的是( ) A . 观察有丝分裂后期的图象，可见纺缍丝牵引着染色体平均分成两组向两极缓慢移动 B . 该同学的操作步骤中错误的是解离后先染色再用清水漂洗 C . f步骤在临时装片上再加一块载玻片，目的是防止盖玻片滑动 D . 可以直接用高倍显微镜找出分裂中期的细胞并观察用代词的适当形式填空小题1:These books are ____ (she). 小题2:___name is Li Lei. (he)小题3:Thank ___ very much. (you)小题4:He is in ____room. (us)小题5:Are ____ Chinese? (he)小题6:How old is ___? (her)小题7:Excuse ____.(I) May I use your ruler?小题8:This is ____ classroom. (we)小题9:Can ____ spell it, please? (you)