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问题 选择题

如右图所示，铜片、锌片和石墨棒用导线连接后插入番茄里，电流计中有电流通过，则下列说法正确的是（ ）

                

A．锌片是负极

B．两个铜片上都发生氧化反应

C．石墨是阴极

D．两个番茄都形成原电池

答案

答案：A

单项选择题

SOX is an alternative (156) for XML. It is useful for reading and creating XML content in a (157) editor. It is then easily transformed into proper XML. SOX was created because developers can spend a great deal of time with raw XML. For many of us, the popular XML (158) have not reached a point where their tree views, tables and forms can completely substitute for the underlying (159) language. This is not surprising when one considers that developers still use a text view, albeit enhanced, for editing other languages such as Java. SOX uses (160) to represent the structure of an XML document, which eliminates the need for closing tags and a number of quoting devices. The result is surprisingly clear.

（156）是（）

A.semantic

B.pragmatics

C.syntax

D.grammar
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单项选择题

用500V兆欧表测氧化锌0.22KV避雷器的绝缘电阻应不低于（）。

A.2MΩ

B.10MΩ

C.0.5MΩ

D.3MΩ
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