信息整理
参考答案：将信息进行选择、分类和编码工作，除去无用的信息提高信息质量。
He was excited because he _____ his father at Chinese chess. [ ]
A. won
B. played
C. beat
食管最常见的良性肿瘤是()
A．脂肪瘤
B．血管瘤
C．平滑肌瘤
D．淋巴瘤
E．腺瘤
