九年级化学中的粗盐提纯实验是重要的综合实验。下列有关它的实验操作（图4）错误的是
A B C D
答案：C
C图中漏斗颈口没有紧贴烧杯内壁。
_____ that she didn't do a good job, I don't think I am abler than her. [ ]
A. To have said
B. Having said
C. To say
D. Saying
正确的行针辅助手法是
A．提插法、捻转法、弹针法
B．提插法、捻转法、震颤法
C．刮柄法、弹针法、提插法
D．搓柄法、摇柄法、刮柄法
