根据《危险化学品安全管理条例》（中华人民共和国国务院令第591号）规定，危险化学品经营企业不得向未经许可从事危险化学品生产、经营活动的企业采购危险化学品，不得经营没有化学品（）或者化学品安全标签的危险化学品。
A. 安全技术说明书
B. 产品说明书
C. 技术说明书
Which statement is true regarding synonyms?（）
A. Synonyms can be created only for a table
B. Synonyms are used to reference only those tables that are owned by another user
C. A public synonym and a private synonym can exist with the same name for the same table
D. The DROP SYNONYM statement removes the synonym, and the table on which the synonym has been created becomes invalid
微信支付 
支付宝支付