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【简答题】
在三种循环结构中，先执行循环操作内容（即循环体），后判断控制循环条件的循环结构是循环结构。
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举一反三
【简答题】A Watch the interviews and circle the answers.
【简答题】What do you learn about these people? Watch the interviews and match the correct information to make true sentences.
【简答题】What is the checkpoint?Please describe the main functions of three checkpoints in cell cycle．
【简答题】Part A Watch the interviews and circle True or False. Correct the false sentences.
【简答题】Watch the interviews about “ Family t rends ” and match the
countries with the correct family trend.
【简答题】Please describe the picture.
【简答题】Watch the interviews and write the words you hear to complete the interviews. Video Track 2-1-3.wmv
【简答题】What is the cell cycle?Please describe the regulation and control of cell cycle．
【简答题】Watch the interviews by Kevin and Gian again and fill in the words you hear.
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