●Sources for data on activity durations and resource requirements can be gathered from whi

A.Summarized queries

B.Granular transactions

C.Voluminous historical data

D.Heterogeneous data sources

A．Gathering secondary data is costly．

B．Collecting secondary data is time consuming．

C．Few sources exist for secondary dA

D．It is not accurate enough．

A.Client tire

B.Presentation tire

C.Business tire

D.Integration tire

A.Component libraries

B.Databases

C.Files

D.All of the above

E.Both B and C

A．How much does the data cost

B．For what purposes were the data collected

C．What language is used in the host country

D．Was the data available on the Internet

●Users also need (71) systems to help them explore the web and discover interesting data sources and interfaces that support different query and search paradigms.

(71) A．negative

B．adaptive

C．passive

D．adaption

A.Past project records (historical data)

B.Commercial techniques (standard practices, rules of thumb)

C.Past project team members knowledge (experience, oldtimers)

D.All of the above

E.A and C only

A、executing

B、performing

C、implementing

D、enforcing

Users also need(69)systems to help them explore the Web and discover interesting data sources and interfaces that support different query and search paradigms.

A．negative

B．adaptive

C．passive

D．adaption

Users also need(71)systems to help them explore the web and discover interesting data sources and interfaces that support different query and search paradigms.

A．negative

B．adaptive

C．passive

D．adaption