【简答题】He is employed in a company which ______ in paper products. (special)
【单选题】A ( ) is a recognizable sign, design or expression which distinguishes products or services of a particular trader from the similar products or services of other traders.
【简答题】Which of the following statements is true about insurance products?
【多选题】平面连杆机构的优点有:( )。
A.
构件的运动形式多样,可以实现给定运动规律或运动轨迹
B.
运动副都是低副,以圆柱面或平面相接触,承载能力高,耐磨损
【判断题】平面连杆机构中,两个构件之间是面接触,因此与高副相比,在承受相同载荷时,其承载能力较大,耐磨损。