题目

类推是学习知识的一种重要方法，以下类推正确的是（ ） A．H2、CO与氧气混合点燃会发生爆炸，所以点燃可燃性气体前一定要检验其纯度 B．CO2、SO2都能与碱溶液反应，由此可知碱能与所有非金属氧化物反应 C．置换反应都是氧化还原反应，所以氧化还原反应都是置换反应 D．有机物都含碳元素，所以含碳元素的化合物都是有机物第二节：语言结构（共10小题，每小题1.5分，满分15分）    阅读下面短文，根据上下文在空白处填上适当的词,或使用括号中的词语的正确形式填空。When I was a ten-year-old girl, I was once asked to deliver a speech titled “A Real Test in My Life”. To talk before the whole class! Just imagine how   31   (terrible) shy I was the moment I thought of that   32     so many eyes fixed upon me. I had no other choice, though. First I was to draft the speech and that was just a piece of cake for me, because I was a good writer－something to pride myself in. But the hard part   33   (lie) in my oral presentation; to read from   34   paper was not allowed; I had to give the speech   35   my memory and in front of such a big audience! A real trial began when I stood on the platform with my legs   trembling and my mind blank. How much time had passed by, I didn’t know. My listeners were still waiting, patiently and without any signs of rushing me. Gradually I found   36   back, giving out my speech with difficulty. Finally I finished. After   37   seemed to be a hundred years, I found my audience applauding. I made it! From then on, my fear of talking before an audience   38   (appear). Actually with my confidence building   39   , I now turn out to be a great speaker. Looking back, I know the greatest difficulty on our way to success is our fear. Overcome it,   40   we will be able to achieve our goals.