搜题请搜索小程序“爱下问搜题”
问题 选择题

It requires ____ your willingness to do the job. It also requires a lot of men­tal effort.

A．less than

B．more than

C．fewer than

D．nothing than

答案

答案：B

单项选择题

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）for the proposed system.

A. hardware and software specification

B. system performance specification

C. formal requirements definition

D. general problem statement
查看答案
单项选择题

().

A．仅为x=+1

B．仅为x=0

C．仅为x=-1

D．为x=0，±1
查看答案