英语四级425并不难。英语四级需要4500左右的词汇量。和高考要求的词汇差不多。只要制定好复习计划，很容易就能拿到425分。
I have a problem with simple silverlight app, this app has a couple of buttons, each button sets mediaelement source to a short mp3 file and plays it, my problem is that when i press the same button s
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