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【单选题】
结合当前国家及各地微课程建设活动，微课视频在输出规格上采用哪一种比较合适 ？A.
1280*720的MP4视频
B.
1280*720的MKV视频
C.
1024*768的MP4视频
D.
1024*768的MKV视频
拍照语音搜题，微信中搜索"皮皮学"使用
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知识点：
皮皮学刷刷变学霸
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