可以使固液及两种不相混溶的液体分离的方法() A.水提醇沉法 B.离心分离法 C.醇 发布时间:2018-02-24 16:40 │ 来源:www.tikuol.com 题型:单项选择题 B1型题 问题: 可以使固液及两种不相混溶的液体分离的方法()A.水提醇沉法B.离心分离法C.醇提水沉法D.盐析法E.吸附澄清法
题型:单项选择题 B1型题 用所给词的适当形式填空。l. If he ______(study) harder, he will catch up with us soon.2. What was the worst______ (ill) you have ever had?3. His father was______ (dress) in a suit.4. My pen was broken.I need______ (buy)a new one.5. The shop is______ (open) from 8:00 a.m. to 8:00 p.m.6. Please______ (not cry) , dear, and you will be all right soon. 查看答案