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【多选题】
可行性研究的内容包括（ ）A.
新系统开发的必要性
B.
经济可行性
C.
技术可行性
D.
组织管理可行性
E.
外部环境可行性
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反馈参考答案：
举一反三
【单选题】While my grandfather is something of a computer expert, my grandmother is a computer illiterate.
A.
during the time that sth is happening
B.
at the same time as sth is happening
C.
as long as
D.
used to contrast two things
【单选题】While my grandfather is something of a computer expert, my grandmother is a computer illiterate.
A.
During the time that sth is happening
B.
At the same time as sth is happening
C.
As long as
D.
Although
E.
Whereas
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