题目内容

肾综合征出血热的病原体是()

A. 登革病毒
B. 汉坦病毒
C. 新疆出血热病毒
D. 埃博拉病毒
E. 西尼罗病毒

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Essay QuestionIn the second unit, we briefly reviewed the history of the Uinted States. From the founding of the country till now, the country has witnessed many historical events ( American Revolution, Cilvil War, Great Depression, etc.) , and set numerous plans and principles dealing with the emerging problems (such as Marshall Plan, Truman Doctrine, New Deal,ect). Please elborate on any of those things mentioned in our textbook and make a comment.Requirements:①Make a survey before writing② Do not copy directly from the text book or other sources③ The essay should bein no less than 150 words. You will be asked to redo the task otherwise.

位于旱地、浅水河中采用土石筑岛施工桩基的桥梁,其承台的施工方法与扩大基础的施工方法类似,可采用()等方法进行施工。

A. 明挖基坑
B. 简易板围堰后开挖基坑
C. 钢板桩
D. 钢管桩围堰

对深水中的承台,可供选择的施工方法通常有()等。

A. 明挖基础
B. 简易板围堰后开挖基坑
C. 钢板桩
D. 钢管桩围堰

等级资料的统计分析,下面说法错误的是

A. 等级资料不能用卡方分析
B. 等级资料在分析程度上的差异时不能用卡方分析
C. 等级资料在大多数情况下仍然要考虑应用卡方
D. 等级资料应用卡方检验可以分析构成比差异的问题
E. 秩和检验可以开展两样本和多样本的等级资料比较

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