At first the Internet was only used by the government. 。()

A.InternetMail

B.StandardIC

C.WEB-EDI

D.XML/EDI

A.public key

B.private key

C.service number

D.help file

What are we told about the current impact of the internet in the second paragraph？

A.Publishers benefit from their exploitation of the interne

B.The internet has made it easier to analyse business trend

C.It is difficult to calculate the true economic value of the interne

D.The internet facilitates the development of the knowledge econom

When does a job applicant scan his certificates？

A．When he finds the desired job on Internet.

B．When he sends off his application.

C．When the firm expresses an interest.

A.内部集成化供应链管理阶段

B.职能集成管理阶段

C.基础建设阶段

D.外部集成化供应链管理阶段

How does the British Queen feel about the Internet？

A．She is enthusiastic about the Internet.

B．She thinks the Internet is boring.

C．She dislikes the Internet.

根据以下资料，回答16~20题。Internet addicts are people who________. A) use the Internet more than enough B) feel depressed when using the Internet C) seldom connect to the Internet D) feel depressed without the Internet

第一信使(first messenger)

A.was the first

B.the first

C.the first who was a

D.she was the first

设有产生式：A→a｜β｜γ，且α、β、γ

ε。则在自上而下语法分析中，对A推导不带回溯的条件是_______。

A．FIRST(a)N FIRST(8)N FIRST(y)＝Ф

B．FIRST(a)N FIRST(β)＝Ф与FIRST(β)∩FIRST(y)＝Ф与FIRST(a)∩FIRST(y)＝Ф

C．FIRST(a)∪FIRST(8)∪FIRST(y)＝Ф

D．FIRST(a)∩FIRST(β)＝Ф或FIRST(β)∩FIRST(y)＝Ф或FIRST(a)∪FIRST(y)＝Ф