单项选择题

下列各条件中何者不是晶形沉淀所要求的沉淀条件（）。
A、沉淀作用宜在较浓溶液中进行B、应在不断的搅拌下加入沉淀剂C、沉淀作用宜在热溶液中进行D、应进行沉淀的陈化

你可能感兴趣的试题

单项选择题

引导瓦斯时,将瓦斯引到回风巷道或引到距离地面多远外的小巷道,以确保工作面的安全? A.
20m B.
15m C.
25m D.
10m

Questions 29
A、It's located in a college town.
B、 It's composed of a group of old buildings.
C、The classrooms are beautifully designed.
D、 The library is often crowded with students.

答案： It's composed of a group of old buildings.