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问题 选择题

— Hello. Is Mr Zhang there?

— ____________, please. [ ]

A. Wait for

B. Have a rest

C. Just a moment

答案

答案：C

填空题
单项式-a3的系数是______，次数是______；单项式
3xy2
10
的系数是______，次数是______．
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单项选择题 共用题干题

Many of the activities performed during the preliminary investigation are still being conducted in (1)， but in much greater depth than before. During this phase, the analyst must become fully aware of the (2) and must develop enough knowledge about the (3) and the existing systems to enable an effective solution to be proposed and implemented. Besides the (4) for process and data of current system, the deliverable from this phase also includes the (5) fortheproposedsystem.

空白（5）处应选择（）

A.hardware and software specification 

B.system performance specification 

C.formal requirements definition 

D.general problem statement
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