1.【答案】D【解析】考查了细胞的结构与功能及特异性免疫,细菌分泌的细胞素侵入人体后主要分布在人体内环境中,人体主要依靠体液免疫来清除,A错。细菌是原核生物,没有细胞核及内质网等细胞器,B和C错。细胞分泌蛋白质的过程中体现了细胞膜的流动性,D正确

【参考范文】One day, Spotty returned from his daily walk with a broken leg. Appearing exhausted, he came to myroom and sat near me, the leg bleeding. I called my mother and she quickly tied a bandage around his leg andgave him food to eat. I was very upset. But the next day, Spotty followed me wherever I went happily asusual though he limped a bit. After this incident my relation with Spotty became more intense. I reallyadmired him a lot for his courageAlmost a year later, one midnight we heard Spotty barking breathlessly. We rushed out and saw himbarking continuously, heading somewhere. After some time Spotty became quiet. I patted him on his backand came inside. The next morning, my heart skipped a beat when I didn't see Spotty. I searched for him ineach and every corner but in vain. And this time he had gone and would never come back. I cried and waitedfor him. But there were no signs of him and I only say him looking at me with his sparking eyes in my dream

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