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问题 填空题

多媒体硬件系统的标志性组成有光驱、A/D与D/A转换、高清晰彩显以及　【2】　硬件支持。

答案

参考答案：数据压缩与解压缩

解析：【解析】压缩可以将多媒体文件缩小到可以传输的程度。

改错题

In a summer night in Taiwan, Xiao Hong was going on her way to school happily then suddenly she felt the street was strong shaking. The trees were torn up and many buildings were leaned down to the ground. Even a car was destroyed by the fallen buildings. She was knocked down by a tree before she knew. Two doctors carried him to safety and she was settled down in a tent for treatment. After some time, she had got over. Seeing such many goods from the mainland of China and other countries, she believed all the destroyed houses would be built.
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填空题

某LC振荡电路，线圈的电感量mH，电容器的容量F，起初，电容器充电后上极板带正电荷，下极板带负电荷，设电键闭合的时刻t=0，那么当s时，电容器的上极板带__________（正或负）电荷，通过线圈的电流正在_______（增大或减小），此时电容器正在_______（充电或放电）。

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