【简答题】受力构件内一点附近取一微元体,承受应力如图所示,其中【图片】,试求该点最大切应力为多少MPa?(填写数字) 【图片】
【单选题】“通过批判旧世界发现新世界”这个思维方法是()。
【单选题】£ Here are some time markers often used with the past simple (PS) or the present perfect (PP). Choose PS or PP for the following words. Some can be used with both. this week
【单选题】£ Here are some time markers often used with the past simple (PS) or the present perfect (PP). Choose PS or PP for the following words. Some can be used with both. already
【单选题】£ Here are some time markers often used with the past simple (PS) or the present perfect (PP). Choose PS or PP for the following words. Some can be used with both. in 2007
【单选题】£ Here are some time markers often used with the past simple (PS) or the present perfect (PP). Choose PS or PP for the following words. Some can be used with both. just