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网络安全解决方案中,()是关键,策略是核心,管理是保证。

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在通货膨胀率很低的情况下,公司债券的利率可视同为资金时间价值

A. 对
B. 错

包过滤器通常是和()配合使用,共同组成防火墙系统。

Please give me more time;(),I shall not be able to finish the paper by next Monday.

A. meanwhile
B. therefore
C. otherwise
D. still

When bargaining,which of the following may be the proper expression for buyers?()

A. I will offer you a special discount of 15%.
B. Can you come down a bit?
C. I’m sorry.It’s my last offer.
D. That’s the best I can do.

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