反应容器操作要点熟悉并掌握容器内（）、反应过程的基本原理及工艺特点。
A、介质的粘度
B、介质的特性
C、介质的PH值
D、介质的含水量
参考答案：B
根据课文内容， 完成下列句子，每空词数不限。
Liz Smith
Liz Smith faces many challenges in her daily life because she is a (1) _________ person. Liz Smith
can't use her (2) _________ well, so normal things have always been difficult for her. Liz Smith loves
(3) _________ and she'd love to have a dog. Liz Smith is able to have a "dog-helper" because of Miss
Li's (4) _________. Liz Smith will send (5) _________ if Miss Li likes.
陶瓷材料主要有哪些相组成，各有什么作用？
