自抗体中提取纯化IgG应采用下列哪种方法（） A.硫酸铵沉淀法 B.亚硫酸钠法 C. 发布时间：2019-01-10 16:07 │ 来源：www.tikuol.com 题型：单项选择题 问题： 自抗体中提取纯化IgG应采用下列哪种方法（）A.硫酸铵沉淀法B.亚硫酸钠法C.离子交换层析法D.免疫双扩散E.免疫单扩散
题型：单项选择题 用方框中所给词的适当形式填空，使短文完整、通顺。一空限填一词，有两个多余选项。get, picture, paint, stand, happen, bad, make, agree, feel, minute, laugh, sleep Peter was a boy about ten. He lived in the village but studied in a school of a town. He _1_up early and went to school by bike after breakfast. One day, on his way home, he saw a lot of people _2_ around a young man. The boy stopped to find out what _3_ there. The young man said, "I've traveled in several countries and seen a lot of pictures, but they were all _4_than mine. I'm sure it's difficult to find anartist like me! I have to come here to look for the best artist in the world." "Please show one of your _5_ to us if it's true!" An old man said. The young man brought out a picture and hung it on the wall. All the people thought it was niceexcept Peter. He found a drawback (缺陷) and showed it to them. It _6_ the young man angry. He saidto the boy, "Are you good at _7_, boy? Paint one for us, will you?" "OK," Peter _8_. He painted the paper black and showed it to the young man. The young manwatched it for nearly ten _9_ and then asked, "What did you paint?" "It's a black pig on the dark night." All the people began _10_ and the young man didn't say a word for a long time.1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 查看答案
题型：单项选择题 阅读《季氏将伐颛臾》中的一段文字，回答下列小题： 孔予曰：“求!周任有言曰：‘陈力就列，不能者止。’危而不持，颠而不扶，则将焉用彼相矣且尔言过矣，虎兕出于押，龟玉毁于椟中，是谁之过与”将“危而不持，颠而不扶，则将焉用彼相矣”译成现代汉语，并说明孔子用这两句话作为论据的性质、所表达的观点以及运用了何种论证方法。 查看答案