多项选择题

核心层应该具有如下几个特性（）

A.便维护性
B.高效性
C.容错性
D.可管理性
E.冗余性
F.可靠性

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单项选择题

€ in €57 million and €141 million probably stands for（）.

A．English
B．the euro
C．European
D．European Currency Unit

单项选择题

According to the first sentence, the sales of HDTV sets since last year, by the time when this article was written, had reached （）.

A．4.6 million
B．9.2 million
C．18.4 million
D．I do not know how many

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