【判断题】二次回路又称二次接线,是将二次设备互相连接而成的电路。
【单选题】有关接触角和润湿性的关系,下列哪个是正确的( )
【单选题】What’s the most important for the designer in advertisements design?
【多选题】有关接触角和润湿性的关系,下列哪几个是正确的( )
【简答题】If your first experience of love filled you with energy and gave you the 1 1 t o explore new areas of life, you’ ll probably always seek romantic partners who are both demanding and giving. If, on the...
【简答题】在基轴制配合中,轴为基准孔,基本偏差代号为 h ,其上极限偏差为 ___________ ,下极限偏差一定小于 ___________ 。
【单选题】What’s the most important for the designer in advertisement design?
【简答题】Welcome to our office ! For graduates who wish to obtain your professional career successfully after graduation in a job fair, it is essential to find a satisfactory job. A job interview, in some case...
【单选题】关于接触角的描述,错误的为( )。
A.
当接触角小于 90 ° ,粗糙度越大,表面越亲水。
B.
当接触角大于 90 ° ,粗糙度越大,表面越疏水。
C.
当接触角等于 90 ° ,粗糙度增大,表面接触角不变。
D.
同一固体材料,光滑表面杨氏接触角总大于温策尔接触角。