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【单选题】
要实现声音和图像数字化,其关键技术是()。
A.
网络通信技术
B.
数据库技术
C.
数字信号处理技术
D.
高级程序设计
拍照语音搜题，微信中搜索"皮皮学"使用
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参考解析：
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举一反三
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tedious
C.
turbulent
D.
terrific
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activities, did
B.
activity, do
C.
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tricky
B.
trail
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D.
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