问题
选择题
已知：CS2（l）+3O2（g）=CO2（g）+2SO2（g），现有0.228克CS2在448mlO2（标况下）中充分燃烧，反应后所得的气体体积（标况）为：（ ）
A 112ml B 224ml C 336ml D 448ml
答案
答案：D
该反应为等体积反应，即反应前后气体的总物质的量相等地，所以，充分燃烧反应后所得气体的体积为448ml
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已知：CS2（l）+3O2（g）=CO2（g）+2SO2（g），现有0.228克CS2在448mlO2（标况下）中充分燃烧，反应后所得的气体体积（标况）为：（ ）
A 112ml B 224ml C 336ml D 448ml
答案：D
该反应为等体积反应，即反应前后气体的总物质的量相等地，所以，充分燃烧反应后所得气体的体积为448ml
课文完型填空 (每题1分,共10题, 满分10分) My name is Elias. I am a poor black worker in South Africa. The time when I first met Nelson Mandela was ___91___very difficult period of my life. I was twelve years old. It was in 1952 and Mandela was the black lawyer to whom I went for advice. He offered guidance to poor black people on their ____92___ problems. He was generous with his time, ___93___which I was grateful. I needed his help because I had very ___94___education. I began school at six. The school where I studied for only two years was three kilometers away. I had to leave because my family could not continue to pay the school fees and the bus fare. I could not read ___95___ write well. After trying hard, I got a job in a gold mine. ____96____, this was a time when one had got to have a passbook to live in Johannesburg. ____97____, I did not have one because I was not born there, and I worried about whether I would become out of work.. The day when Nelson Mandela helped me was one of my happiest. He told me how to get the correct papers so I could stay in Johannesburg. I became more hopeful about my future. I never forgot how kind Mandela was. When he organized the ANC Youth League, I _____98_____ it as soon as I could. He said: “The last thirty years have ____99___the greatest number of laws stopping our rights and progress, until today we have reached a stage ____100_____ we have almost no right at all.”
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