【单选题】对于通风系统的要求,不正确的是______。
【判断题】用阶梯剖剖切机件,绘制剖视图时应画出转折平面的投影。
【判断题】International trade is a win-win situation.
【判断题】International trade is a win-win situation for all countries that participate.
【单选题】某材料重2625g,其含水率为5%,该材料所含水量为()。
【判断题】Mercantilists believe that international trade is a win-win undertaking .
【判断题】用阶梯剖剖切机件,绘制剖视图时应画出剖切平面的转折平面的投影。