提取分离多糖，常用的方法是 A．水提醇沉 B．醇提水沉 C．碱水提后，离子交换色谱 发布时间：2019-04-14 23:23 │ 来源：www.tikuol.com 题型：单项选择题 问题： 提取分离多糖，常用的方法是A．水提醇沉B．醇提水沉C．碱水提后，离子交换色谱D．碱水提后，聚酰胺色谱E．醇提后，氧化铝吸附色谱
题型：单项选择题 阅读理解。 Did you donate (捐献) anything to Sichuan? People all over China and the world are giving help to the suffering (受苦的) people there after the Wenchuan Earthquake. Zha Xiaoxu is a Junior l student from Anhui. She began to save money when she was in kindergarten (幼儿园). Last week, she broke her piggy bank (存钱罐) open and donated all the 700 yuan to Sichuan. Han Han is one of the most popular authors (作家) among young people. Shortly after the earthquake, herushed to Sichuan and to help as a volunteer. Pop singer Jay Chou had a concert in Chongqing on Saturday. He decided to give all the ticket money toSichuan. Chou has already donated 500,000 yuan to the quake areas. Foreign rescuers (救援人员) from Japan, Russia, the Republic of Korea and Singapore are in Sichuan to help. Now more foreign doctors are on their way to Sichuan to look after the injured (受伤的) people. Person(s)Career(s)Donate something to SichuanZha Xiaoxua Junior 1 studentdonated all the 700 yuanHan Han 1._______ rushed to Sichuan and to help as a volunteer2._______ a pop singer 3._______ in Chongqing and decided to give all the ticket money to Sichuan and has already donated 500,000 yuanForeign rescuers from Japan, Russia, the Republic of Korea and Singapore are in Sichuan to help.More foreign doctors are on their way to Sichuan to 4._______. 查看答案