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音的（　　）

excellent girl Alice is in my class!

A．二氧化碳用于灭火﹣﹣能与水反应   B．一氧化碳用于冶炼金属﹣﹣氧化性

C．金刚石用于裁玻璃﹣﹣硬度大   D．洗涤剂用于去除油污﹣﹣

怎样才算是一篇好的议论文呢？①，但其中有见地的看法都应该符合一个基本标准：你的文章是否说清楚一个道理。议论文为了“说理”，这应该成为一个常识。②，因为常识总是很朴素，很不起眼。写议论文，应该用一些手段，但不容忽视的是任何手段都应该体现“说理”的价值。炫耀华丽的文字，编织离奇的故事，展示博杂的知识……这些手段如果不能有助于议论文的“说理”，③。

）如图甲是插入式电阻箱的结构示意图，它的最大电阻值是 Ω，图中A、B两个接线柱之间的电阻值是 Ω；乙图中电阻箱的示数是　 Ω，它与滑动变阻器相比，最大好处是 ．

Running for a Dream

    I will never forget that November day. It was hotter than normal. This was the1my father and I had waited so long for, because we had been working towards this race for three years. Dozens of familiar faces from church and school flashed across my view. They had come for me. I saw worry and excitement on my father's face. Then the race began!

    For the first two and a half miles, I felt2. I had never before been so ready for something. The weeks leading up to the race were filled with controlled3and a strict diet. My friends hadn't seen me in weeks, but they understood the4required to make my dream a reality. As in all of my races, I didn't5out in the front, I loved the pleasure of passing people as my strength overtook their premature speed.

    Then without warning, my strength began to decrease. Neck and neck with one of my greatest competitors, I could see the finish line. I had begun the final dash into6when my knees became weak and my legs gave way. Nothing I could do would make them7weight.

    I watched as runners rushed by me. Although I knew my dreams of victory were destroyed, I had to finish the race. However, my legs hurt badly. With all of the 8 left in me, I got on my hands and knees and crawled(爬), inch by inch, across the finish line. Voices, both9and familiar, cheered me on. They gave me the courage to keep10until the very end.

    The doctors were there in seconds, but my eyes searched the crowd for him. There was only one person I wanted to11to. I whispered, "I'm so sorry, Dad, I'm so sorry I12you." He looked at me, saying, "You could never disappoint me. Sometimes these things just happen. All that matters is that you did your best."

    "But we worked so13. What about our dream?" He reached over for my hand and said, "Don't you know that you are my dream and it has come true?"

    It wasn't long before my running shoes were back on, marking a14path for my journey, I learned that all of the miles, the tears, the sweat, and the pain my dad and I experienced together were not for a15. What I realized, though, was that to him, I was the greatest prize he had ever won.