() A.色谱内标法 B.色谱外标法 C.计算色谱峰拖尾因子 D.计算容量因子 E. 发布时间:2017-05-03 03:59 │ 来源:www.tikuol.com 题型:单项选择题 问题: ()A.色谱内标法B.色谱外标法C.计算色谱峰拖尾因子D.计算容量因子E.理论板数计算色谱法中,以下公式分别用于
题型:单项选择题 阅读短文,选择正确的选项。 I buy some tea for my grandpa. He likes to drink tea. I buy some fruits for my grandma. She likes to eatfruit. I buy a hat for my aunt and a beautiful kite for my cousin.( ) 1. grandpa( ) 2. grandma( ) 3. aunt( ) 4. cousina. hatb. teac. kited. fruit 查看答案