问题描述：
[单选]
我国嫦娥四号成功实现人类历史上首次月球背面软着陆。若任务车在月球表面匀速行驶2小时，通过的路程为0．4千米，则它的速度是（）千米/时，在此过程中以月球为参照物，任务车是（）的。
A．5；静止
B．5；运动
C．0.2；静止
D．0.2；运动
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上一篇：A Once there was a king． He was wise but everyone was afraid of him． His face showed the sadness deep in his heart． So there were deep （）lines（皱纹） on his face． In his country lived a beautiful girl． Everyone seemed to love her， so did the king． He wanted to （）her， and finally he decided to speak to her of his love． After he dressed in his best clothes， he looked in the （）， but he saw a hard face， （）when he tried to smile． ＂How about wearing a mask（面具）？”he thought． Then he ordered his magician to paint a mask that looked kind and happy and handsome． The magician （）and said，“But you must keep your own face in the same lines that I paint and be kind to all people from your heart． If not， the mask will break．" The mask looked so （）that no one knew it was not the true face of the king． Months passed， the beautiful lady got married to the king， and the king treated everyone （）to keep the mask from breaking． At last， the king didn"t want to cheat his beautiful wife any more． （）he asked the magician to take the mask off． Surprisingly， he found his face was just like the mask he had worn for so long! This story tells us that a man is what he is in his heart．1．
下一篇：生活中的很多安全规范都蕴涵着物理学原理。用手压气球，气球形变，此现象主要表明力可以改变物体的（）；运动员踢球时，球向上飞出，此现象主要表明力可以改变物体的（）。在（）力的作用下，球最终会落向地面。
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