记叙了普罗米修斯为了解除人类没有____的困苦，勇敢地盗取____，从而给人类带

来____和____，并与____进行不屈不挠斗争的动人传说，赞扬了普罗米修斯的____和献身精神。

请和你的同学一起讨论讨论，找出答案。

    Tom, Sam, Jim and Jack live in a building of four floors. They live on different floors. They have different jobs―an engineer, a worker, a teacher and a doctor. Tom lives above Sam, but below(在下面) Jim. Jack lives on the third floor. The doctor lives above the teacher, but below the worker. The engineer lives on the ground floor. What are their jobs? Which floor does each of them live on?

在反应2A(g) + B(g)2C(g)（正反应放热）中，为了增大A的转化率，应采用的反应条件是（   ）

某种细胞的直径是5×10^﹣4毫米，这个数是（   ）

点A为数轴上的表示-2的动点，当点A沿数轴移动4个单位长度到点B时，点B所表示的有理数为（　　）