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【单选题】
受剪切变形的杆件,各截面上________。
A.
只有正应力
B.
只有剪应力
C.
两者都有
D.
两者都没有
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【判断题】钻孔灌注桩施工时,当桩位处于地下水位以上时,则只能采用干作业的施工方法。(    )
A.
正确
B.
错误
【简答题】根据短文内容,选择正确答案 Boys and girls, here I will tell you something about my first trip to the USA. When I get to Kennedy Airport, I begin my visit to the USA. First, I go to Roy Senior high School. I’m happ...
【简答题】短文改错(满分10分) After I finished the school this year,I began to 91._________ look for work. Now several month later, I still didn't 92._________ find the job that I was interested. Last Sunday morning ...
【单选题】下图所示传动系统由蜗杆传动和圆锥齿轮传动组成,已知输出轴上的锥齿轮4的转向n4。欲使中间轴上的轴向力能部分抵消,请回答以下问题。【图片】第1问:蜗轮2的轴向力和圆周力的方向为 。
A.
轴向力向右、圆周力向纸外
B.
轴向力向左、圆周力向纸内
C.
轴向力向右、圆周力向纸内
D.
轴向力向左、圆周力向纸外
【简答题】完形填空。 When I was 14, my family went on our first trip to the United States. My uncle moved there several years ago to work in the 1 industry in California. Although we flew several times before. this ...
【单选题】Word表格中的单元格区域A3:C5包含了( )。
A.
9个单元格
B.
2个单元格
C.
3个单元格
D.
6个单元格
【简答题】根据括号内的英(汉)语提示,完成句子。 小题1:My grandfather has (去世) for three years. 小题2:The movie that has monsters always(使……感兴趣)children a lot. 小题3:The Party is considering (提供) the farmers with more care. 小题4:I’ve (实...
【简答题】读一读,补全短文。 ate    sat    liked    had    watched    went    excited Last week, I had my first trip on an airplane. It was fun! I ___________ next to the window. I saw houses, parks, and swimming pools ...
【简答题】钻孔灌注桩施工,当桩位于地下水位以上时,可采用 成孔方法;若处于地下水位以下则可采用 成孔方法进行施工。
【单选题】我国居民所需能量约65%应来自
A.
谷类
B.
豆类
C.
蔬菜类
D.
油脂类
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