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Absent from In the absence of Present from In the presence of
光纤制造商（如Corning） 多媒体软件商（如RealNetworks、Macromedia等） 在线经纪（如嘉信理财、E*Trad 订购公司（如WSJ.com）
stated announced demanded suggested
had had have have been had have had
光纤制造商（如Corning） 多媒体软件商（如RealNetworks、Macromedia等） 在线经纪（如嘉信理财、E*trad 订购公司（如WSJ、com
the chairman chairman a chairman chairmen
///; the an; /// a; /// the; the
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