【单选题】If the projection of a cylinder on the projection plane perpendicular to its axis is a circle, the other two projections are ( )
【单选题】某破伤风患者,神智清楚,全身肌肉阵发性痉挛、抽搐,所住病室环境,下列哪项不符合病情要求
【判断题】已知视图与轴测图是对应的。The two views are the projections of the pictorial figure .【图片】
【判断题】The two projections of a point can define it's position. 点的两面投影能唯一确定其空间位置。( )
【判断题】The horizontal projections and the frontal projections of two lines are parallel to each other respectively, and therefore these two lines must be parallel in space.
【判断题】潜在国民收入是经济中实现了充分就业时所能达到的国民收入水平。
【判断题】与人交往中要求面带微笑。气氛庄严时、别人出洋相尴尬时、发现他人身体有残疾时也要微笑。
【单选题】某破伤风患者,神智清楚,全身肌肉阵发性痉挛、抽搐,下列有关病室环境的安排,不符合要求的是
【单选题】某破伤风患者,神智清楚,全身肌肉阵发性痉挛、抽搐。所住病室环境,下列不符合病情要求的是