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噴飯的數學答案

噴飯的數學答案<br><br><img src="http://img8.uploadhouse.com/fileuploads/9662/96625880799ceaf2d92cfda92298f165e23e2fd.jpg" onload="if(this.width >600) {this.resized=true; this.width=600;}" alt="" border="0"><br>