Variant是一种特殊的数据类型，Variant类型变量可以存储除了定长字符串数据及自定义类型外的所有系统定义类型的数据。Variant类型变量还可具有Empty、Error和Null等特殊值。

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  A . 2个电极 B . 3个电极 C . 1个基极 D . 2个PN结

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• Excel工作表就是数据清单，数据清单是一种特殊的工作表。

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• Variant是一种数据类型，因此只能存放象其它数据类型一样，无特殊值.

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• 记录是一种特殊类型的文件。

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• 建造合同是一种特殊类型的经济合同，其主要特征表现在（）。

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• 根据巴塞尔协议Ⅱ，法律风险是一种特殊类型的（）。

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• 渐进性坏死也是一种特殊类型的凝固性坏死

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• 次级社会关系是一种特殊主义取向的关系类型。

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• Faceplate是一种特殊类型的（）。

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• 法律风险是一种特殊类型的操作风险。（）

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• 免疫抑制是一种特殊类型的免疫应答。（）

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• 计算机的堆栈是一种特殊的数据存储区，数据存取采用后进先出的原则。

  A . 正确 B . 错误

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• 质量管理体系所要求的文件应予以控制．特殊过程的文件是一种特殊类型的文件。

  A . 正确 B . 错误

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• Dim x As Variant与下列哪个语句等价（）。

  A . Dimx! B . Dimx% C . Dimx D . Dimx＃

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• 多型是一种（）维的特殊类型的同质多象。

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• 初级关系是一种典型的特殊取向的关系类型，而次级关系是一种明显的普遍主义取向的关系类型。

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• 在VB的基本数据类型中，变体类型（Variant）可以表示任何类型的变量，如果有定义Dima，则以下变量赋值中正确的是（）

  A . a$＝"OK" B . a=OK C . a=04/01/2001 D . 以上都不正确

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• 串是一种数据对象和操作都特殊的线性表

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• Variant类型变量的缺省值是________。

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• Monochronic time （M-time) and polychronic time （P-time) represent two variant solutions to

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• 商誉是一种特殊类型的无形资产，()。

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• 土楼在泉州数量不多，是一种特殊的民居类型，主要分布在（)。

  A．德化 B．永春 C．石狮 D．惠安

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• 在面向对象的程序设计中，将数据和处理数据的操作封装成一个整体就定义了一种事物的类型，称作“类”。类是一种抽象的概念，属于该类的一个实例叫做“【 】”。

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