Linux系统中，下列关于文件管理命令cp与mv说法正确的是（）。A.没有区别 B.

全酶由______和______组成，两者所起的作用不同，其中______决定酶的专一性和高效率，______起传递电子、原子或化学基团的作用。

各网、省调应在每季度结束的（）前（遇节假日相应提前）以电子邮件方式向国调及上级网调上报水库调度运行季报。

A.3天

B.5天

C.2天

D.7天

WebSQL is a SQL-like (26) language for extracting information from the web. Its capabilities for performing navigation of web (27) make it a useful tool for automating several web-related tasks that require the systematic processing of either ail the links in a (28) , all the pages that can be reached from a given URL through (29) that match a’ pattern, or a combination of both. WebSQL also provides transparent access to index servers that can be queried via the Common (30) Interface.

A．query

B．transaction

C．communication

D．programming

新生儿可以参加医保吗？如何享受医疗保险待遇？

推销员在处理顾客异议时应遵循什么原则？