写作: Write an invitation card with the information given below.(请根据以下信息写一封请柬) 1.邀请人:John Robinson夫妇 2.被邀请人:Bill Black夫妇 3.事由:John Robinson夫妇定于1月26日星期六晚7:00在河北饭店举行晚宴, 庆祝结婚二十周年,邀请Black夫妇出席。要求回复:13912345678
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【简答题】News report 2 Read the choices. Then listen to the news report and choose the best answer to each question you hear.
【简答题】If three bonds are otherwise identical, the one exhibiting the highest level of positive convexity ismost likely the one that is: A. option-free B. callable C. putable