【判断题】询价是采购作业流程上的一个必要阶段。 ( )
【多选题】从广义的角度,材料腐蚀的定义是:材料腐蚀的定义是:材料腐蚀是材料受环境介质的 的 、 、 作用等而破坏的现象。
【单选题】船舶发生中拱变形时,船体受()弯矩作用,上甲板受(),船底受()
【简答题】阅读理解。 My friend Matt and I arrived at the Activity Centre on Friday evening. The accommodation wasn't wonderful, but we had everything we needed (beds, blankets, food), and we were pleased to be out o...