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问题 选择题

下列关于物质性质变化的比较，不正确的是[ ]

A．酸性强弱：HIO4＞HBrO4＞HClO4

B．原子半径大小：Na＞S＞O

C．碱性强弱：KOH＞NaOH＞LiOH

D．金属性强弱：Ca＞Mg＞Al

答案

答案：A

选择题

The U.S. official said North Korea --- and Iran --- should follow in the steps of Libya, which last December said it would work__________ to allow international weapons inspectors to do their work.

A．unconditionally

B．unwillingly

C．unfortunately

D．uncomfortably
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多项选择题

以下服务与其核心设备相对应的为（）。

A.Wap over GPRS---Radius Server

B.GSM语音---MSC

C.CMNet---GSN

D.Wap over GSM---MFS
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