问题
选择题
下面是人体吸入气体和呼出气体成分含量比较表，在“成分”一栏中，甲、乙、丙表示二氧化碳、氧气、其它气体，其中表示二氧化碳气体的是
成分 | 吸入气体/% | 呼出气体/% |
甲 | 20.96 | 16.40 |
乙 | 0.04 | 4.10 |
丙 | 79.00 | 79.50 |
合计 | 100.00 | 100.00 |
A．甲
答案
B
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下面是人体吸入气体和呼出气体成分含量比较表，在“成分”一栏中，甲、乙、丙表示二氧化碳、氧气、其它气体，其中表示二氧化碳气体的是
成分 | 吸入气体/% | 呼出气体/% |
甲 | 20.96 | 16.40 |
乙 | 0.04 | 4.10 |
丙 | 79.00 | 79.50 |
合计 | 100.00 | 100.00 |
A．甲
B
 I’d been travelling for long hours on a lonely country road when I had a flat tyre. So I had to and get the tools to fix the problem. It certainly wasn’t doing this with a white shirt and suit on. Nightfall was approaching. Suddenly a car pulled up beside me. A man got out and offered to me. Seeing tattoos (纹身) on his arm, I became as thoughts of robberies flashed through my mind. But I could say anything, he had already begun to take the tools to change the . While watching him, I happened to look back at his car and noticed someone sitting in the passenger seat. This me. Then, without warning, it began to rain. He suggested that I wait in his car because my car was unsafe. As the rain increased, I unwillingly agreed. When I settled into the back seat, a woman’s voice came from the front seat. I replied with much when seeing an old woman there. It must be his mother, I thought. To my surprise, the old woman was a neighbor of the man who was helping me. “Jeff insisted on stopping when he saw you the tyre.” “I am grateful for his help,” I said. “Me too!” she said with a smile. He helped drive her to see her husband twice a week in a nursing home. She also said that he at the church and taught disadvantaged students for free. Finally, Jeff helped me change the tyre. I tried to offer him money and of course he refused it. As we shook hands to say goodbye I apologized for my stupid at the first sight of him, and this incident warned us that we shouldn’t judge people by the way they .
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