【简答题】Sometimes people cheat in daily life. When people cheat, it’s not fair to other people, like the kids who studied for the test or who were the true winners of a . Many people like the action of ch...
【简答题】《中华人民共和国循环经济促进法》规定:发展循环经济应当在技术可行、经济合理和有利于节约资源、保护环境的前提下,按照( )的原则实施。
【单选题】According to ________ People's Daily article, 40% of the lakes in Jiangsu have dried up in ________ past 30 years.
【判断题】有些活塞在裙部开槽,其中横槽叫绝热槽 ,竖槽叫膨胀槽 。
【简答题】有些活塞在裙部开槽,其中横槽叫(),竖槽叫()。
【单选题】下列说法中错误的有()
A.
临界力越小,压杆的稳定性越好,即越不容易失稳
B.
截面对其弯曲中性轴的惯性半径,是一个仅与横截面的形状和尺寸有关的几何问题
C.
压杆的柔度λ综合反映了压杆的几何尺寸和杆端约束对压杆临界力的影响
D.
压杆的柔度λ越大,则杆越细长,杆也就越容易发生失稳破坏
【单选题】According to a report on Daily Mail, it’s on Wednesday _____ people start feeling really unhappy.
【单选题】This year’s National Day ____ in a practical way, which is reported in People’s Daily.