题目内容
系统升级的办法包括________、________和________等
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计算：9÷13＋13÷9＋11÷13＋14÷9＋6÷13=______．计算：9÷13+13÷9+11÷13+14÷9+6÷13=______．
You should spend about 20 minutes on this task.The pie charts below give information aboutYou should spend about 20 minutes on this task. The pie charts below give information about the household expenditure of two average U.S. families in different years. Summaries the information by selecting and reporting the main features, and make comparisons where relevant. Write at least 150 words.
WRITING TASK 1You should spend about 20 minutes on this task.The diagram shows how paper cWRITING TASK 1 You should spend about 20 minutes on this task. The diagram shows how paper clips are produced. Write a description of the production process. Write at least 150 words.
腹膜与脏器的关系分哪几种类型 各举一例。 （）
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