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【多选题】
多媒体硬件系统主要包括_____。A.
计算机
B.
音频卡
C.
多媒体板卡
D.
扫描仪
E.
多媒体外部设备
F.
麦克风和扬声器
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【简答题】阅读理解 It was 25th December. Marie，a 13-year-old Australian girl，was happy.It was Christmas and Marie’s mother was a very special cake.She put four small coins(硬币)into the cake and then baked it....
【简答题】《天净沙 秋思》的作者是( ),张养浩在《山坡羊 潼关怀古》中写道: 伤心秦汉经行处,宫阙万间都做了土。( ),( );亡,百姓苦。
【简答题】完形块空。 It was December 25, 1972. Marie, a 13-year-old Australian girl, was happy. It was 1 and Marie's mother made an unusual cake. She put four small coins(硬币)into 2 . This four small coins were for g...
【单选题】下列互为共轭酸碱对的是( )
A.
H 3 PO 4 - PO 4 3-
B.
HAc-Ac -
C.
H 2 CO 3 - HPO 4 2-
D.
H 2 PO 4 - - PO 4 3-
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