题目内容

Government cannot operate effectively（）it is free from such interference.

A. so long as
B. so that
C. unless
D. because

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Since the energy crisis, these big cars have become a real liability. They cost too much to run（）

A. lack of reliability
B. substitute
C. costly means of transport
D. disadvantage

视图是【15】的表，其内容是根据查询定义的。

Linux操作系统与Windows NT、Netware、UNIX等传统网络操作系统最大的区别是______。

A. 支持多用户
B. 开放源代码
C. 支持仿真终端服务
D. 具有虚拟内存的能力

Different (country) ______ have different weather.