【单选题】以下说法正确的是( )
A.
拉伸载荷下无限大体中的圆盘形埋藏裂纹,应力强度因子与裂尖点位置有关
B.
拉伸载荷下半无限大体中的半椭圆表面裂纹,前自由表面修正系数是一个常数
C.
任意条件下,都可以通过叠加原理由拉伸、弯曲载荷作用下表面裂纹的应力强度因子解,来计算拉、弯组合载荷作用下的应力强度因子
D.
在拉伸载荷作用下,无限大体中圆盘形埋藏裂纹的应力强度因子在其圆周上处处相等
【简答题】Hundreds of workers sat___ on the factory floor waiting for the assembly line to start again. 2. To some of our problems there was more than one right answer, so we were looking at the student's reas...
【简答题】人类的物质财富和精神财富,都是人类利用 、 的结果。人类发展史证明,人类文化的产生正是人与自然环境的相互关系的产物。
【单选题】( ) 是指电子商务企业,将大量的资金用于物流队伍、运输车队、仓储体系建设,自行组建物流配送系统,经营管理企业的整个物流运作过程。
【单选题】What is the main idea of the passage?
A.
The general pay floor has risen too far and too fast.
B.
Whether employment will be negatively 'affected is uncertain.
C.
Economic policies should be made with great caution.
D.
The general pay floor began moderately, but now threatens jobs.
【判断题】人类文化的产生是人与自然环境的相互关系的产物
【单选题】走中国特色社会主义文化发展道路,向着建设社会主义文化强国的宏伟目标前进,关键是()
【单选题】Brian was working on the floor of a chain electronics store trying to help a confused customer. The customer said, "The television sets look the same, but the model numbers are different and this one ...