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【单选题】
“政者，正也”的意思是（）A.
以身作则
B.
奋不顾身
C.
勤奋努力
D.
艰苦朴素
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【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...
【单选题】According to ________ People's Daily article, 40% of the lakes in Jiangsu have dried up in ________ past 30 years.
A.
the；a
B.
不填；the
C.
a；the
D.
不填；a
【单选题】关于压杆稳定性,正确的说法是 。
A.
其他条件相同时轴向压力越大,临界力越高
B.
其他条件相同时轴向压力越大,临界力越小
C.
要让欧拉理论可用,应使压杆的柔度尽可能大
D.
其他条件相同时λ越大,压杆的稳定性越好
【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.
A.
when
B.
which
C.
what
D.
that
【单选题】This year’s National Day ____ in a practical way, which is reported in People’s Daily.
A.
is to be observed
B.
observe
C.
observes
D.
is to observe
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