A. 正确 B. 错误
A. completes a transaction on a table B. modifies the structure and data in a table C. modifies the data but not the structure of a table D. modifies the structure but not the data of a table
A. 离子交换层析 B. 亲和层析 C. 凝胶层析 D. 聚酰胺层析