【判断题】对同一段水平梁而言,剪力为零,则弯矩图为水平线;剪力图为常数(不等于零),则弯矩图为斜直线,且剪力图在上方(大于零),弯矩图为下斜线,剪力图在下方(小于零),弯矩图为上斜线。
【简答题】请问什么是CAD,并简述下GIS与CAD的异同?
【单选题】For the goods under S/C No.234, we ______ space on S.S East Wind due to arrive in London around May 3.
【单选题】For the goods under S/C No.234,we _____ space on S.S East Wind due to arrive in London around May 3.