【单选题】波长【图片】线偏振光垂直入射到一块光轴方向平行于表面的方解石晶片上,若要使o光和e光从晶片出来时的相位差为【图片】,晶片的厚度等于多少?已知【图片】, 【图片】.
【判断题】既定秩序,以及作为依据的资本分配,通过它们的存在本身,也就是说通过它们一旦公开和正式地显示自己并被(不)识别和承认时产生的象征效应,促成了它们自身的永存。因此,社会学不能按照涂尔干的告诫,“把社会现象当作事物来对待”,否则就会忽略诸社会现象是客观社会存在中的认识对象(哪怕涉及某种不识)这一事实赋予它们的一切。
【单选题】If he __ his legs yesterday, he __ with us now.
A.
hadn’t hurt ; would go
B.
hadn’t hurt; would have gone
D.
didn’t hurt; would have gone
【判断题】Traffic light system has the feature of duality.
【简答题】Does the traffic light system have duality?
【单选题】If David his legs in the last training, he would join in the coming World Cup, which he has been longing to compete in.
【简答题】Does traffic light system have duality? Why or why not?
【判断题】Traffic light system has the feature of duality.
【简答题】does the traffic light system have duality?