沉淀滴定法要求沉淀的()要小,反应()要快。
参考答案:溶解度;速度
— It's a long time since my mother worked here in the car factory.
— _____?
A.Does she still enjoy working here
B.Does she wish to change a new job
C.What kind of job does she do here
D.Where is she working at present
教学工作的基本规范是()
A.教学原则
B.教学目标
C.教学方法
D.教学组织形式