题目内容：
影响一台计算机性能的关键部件是（ ）。
A．CD—ROM B．硬盘
C．CPU
D．显示器
参考答案：
答案解析：
单选题：影响一台计算机性能的关键部件是（ ）。
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B．硬盘
C．CPU
D．显示器
B．硬盘
C．CPU
D．显示器
He has got too much __ to worry about your problem．
He has got too much __ to worry about your problem．A．on his mind B．out of min
The map shows the __ of this species across the world．
The map shows the __ of this species across the world．A．balance B．distribution
When you have finished that book, don't forget to put it on
When you have finished that book, don't forget to put it on the bookshelf, ．__
请在第(47)处选择正确答案_______
请在第(47)处选择正确答案_______A．cut down B．cut off C．cut out D．cut short
（1）在名称为Form1的窗体上画一个名称为Check1的复选框数组，它含4个复选框，它们的标题依次为"Item1"、"
（1）在名称为Form1的窗体上画一个名称为Check1的复选框数组，它含4个复选框，它们的标题依次为"Item1"、"Item2"、"Item3"和"Item