【判断题】箱形基础适用于建筑荷载较大,地基较弱的建筑,但是施工复杂,造价较高。
【简答题】短文改错 Recently, my classmates have had a hea ted discussion about if we should have optional courses (选修课) in high schools. Some students were in favor of optional courses. They say interest is best t...
【判断题】在真空的静电场中,通过任一闭合曲面的电场强度通量等于该闭合曲面所包围的电荷的代数和。
【简答题】高斯定理:在真空的静电场中,通过任意一个闭合曲面(高斯面)的 ,等于该闭合曲面所包围的 除以 。
【简答题】荷兰生物学家拜登代克提出了______ 。
【单选题】We have new work tomorrow, so we should have all this work .
【简答题】用下表数据(单位:万元)计算净现值,基准折现率为10%,并判断项目是否可行?