题目内容

新疆出血热病毒与汉坦病毒的相似点是（）

A. 病毒结构与培养特性
B. 抗原性
C. 传播媒介
D. 致病性
E. 储存宿主

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肾综合征出血热的流行与下列哪种动物有关？（）

A. 鼠
B. 猫
C. 狗
D. 猪
E. 牛

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

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