【判断题】当柱子比较细长时,破坏荷载小于短柱,且柱子长细比越大,破坏荷载小得越多。
【判断题】-i[后]是舌尖前、高、不圆唇元音。()
【单选题】听力原文:W: Can you make me a cabinet four feet high and three feet wide? M: Sure, how many shelves do you need? Q: What most probably is the man's occupation? (16)
【简答题】循环式制动压力调节器是在制动总缸与轮缸之间 一个 。直接控制轮缸的制动压力。
【判断题】区分固定效应和随机效应的关键是随机变量αi是否与Xit 无关。