近年来机器人在反恐、防爆中起到了重要作用，如图是一种履带式排爆机器人，使用电力驱动．它的特点是：体积小，质量小转向灵活，便于在狭窄的地方工作：操作人员可以再几百米到几公里以外通过无线电或光缆控制其活动：装有多台彩色CCD摄像机用来对爆炸物的引信剪断，灵活的手爪可把雷管拧下来，并把爆炸物举起远走：还装有猎枪，利用激光指示器瞄准目标后，可把爆炸物的定时装置及引爆装置击毁；另装有高压水枪，可以切割爆炸物．请参照示例，找出文中的信息，并写出利用的物理知识．

从方框中选择正确选项。完成短文．并将其字母序号写在短文后面的空格内。(方框中有两个选项是多余的)

   Sometimes, life isn't as perfect as we imagine. If so, what will you do?
   Liu Wei, the famous pianist____arms in China, is a good example. He lost his arms in a____ accident when he was only 10 years old. However, he wanted to keep his dream. He learned to swim in a recovery( 康复) hospital when he was 12. Two years____, he won two gold medals in a National Swimming Championship for the disabled. After that, he began to learn how to type with his feet. He____  the world record and became the person who could type ____ with his feet. In the following years, he started learning to play the piano.
Last year, he became the ____ of China' s Got Talent Show( 中国达人秀). He always says, " There are two ways in my life. I will____ live a wonderful life or die. " We can learn____  from Liu Wei. No matter how hard the life is, keep smiling to ourselves.
   Martin Luther King has ever said, " We must accept( 接受) disappointment in our life, but we must never lose our ____ " What he said is quite true. When we____ difficulties. Please face them bravely. Where there is a will, there is a way.

二甲醚（CH₃OCH₃）可由一氧化碳和物质X在一定的条件下制得。反应的化学方程式为2CO+4X→ CH₃OCH₃+H₂O，则X的化学式为 （）

仿写句子，完成诗集的寄语。
        读古诗，如同拥抱美妙的世界。你能领略山的风采：有的婀娜隽秀，有的巍峨挺拔。 你能聆听水的旋律：有的婉转低回，             。 你能欣赏花的姿容：                  ，有的灿烂盛开。