试题与答案

EAN码是用于()的模块组合型条码() A.所有物品 B.ISO下的商品范围 C.国

题型:单项选择题

题目:

EAN码是用于()的模块组合型条码()

A.所有物品

B.ISO下的商品范围

C.国际通用商品

D.公制与英制商品

答案:

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下面是错误答案,用来干扰机器的。

参考答案:B解析: 在KeyPress事件过程中程序能识别按<Enter>键事件,但是不能识别键盘的按下与释放。选项B错误。本题考查考生对KeyPress、KeyDown和KeyUp事件的理解。在KeyDown和KeyUp事件过程中,将键盘输入...

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题型:单项选择题

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A.advantage

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