皮皮学，免费搜题
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【单选题】
理想在现实中产生,但不是对现状的简单描绘,而是人们对未来美好生活的憧憬和期待。 这体现了理想具有A.
超越性
B.
实践性
C.
时代性
D.
主观性
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【简答题】在SQL中，create view、alter view和drop view命令分别为[填空(1)]、[填空(2)]和[填空(3)]视图的命令。A. 建立B. 修改C. 删除
【简答题】通过局域网接入Internet，只需申请一个IP地址，局域网内的所有计算机就都可以上网了，它是通过【 】实现的。
【多选题】Which of the following are true for service providers?
A.
Photo sharing, video sharing, and user-generated content in blogs and social network sites are all services provided to customers.
B.
Data storage is an online computer service
C.
Service providers offer consumers valuable, convenient, time-saving, and low-cost alternatives to traditional service
D.
There are no free services
【多选题】Which of the following are 对 for service providers?
A.
Photo sharing, video sharing, and user-generated content in blogs and social network sites are all services provided to customers.
B.
Data storage is an online computer service.
C.
Service providers offer consumers valuable, convenient, time-saving, and low-cost alternatives to traditional service.
D.
There are no free services.
【简答题】通过局域网接入Internet，只需申请一个IP地址，局域网内的所有计算机就都可以上网了，它是通过 【9】 实现的。
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