2021-2022 英语周报 九年级 FJM 44答案

11.A解析:图中甲是B细胞,乙是浆细胞,丙是记忆B细胞,物质①是抗体,图中②是身份标签—抗原识别受体,A正确;①是抗体,属于分泌蛋白,分泌蛋白合成与分泌过程为:核糖体合成蛋白质→内质网进行粗加工→内质网“出芽”形成囊泡→高尔基体进行再加工形成成熟的蛋白质→高尔基体“出芽”形成囊泡→细胞膜,整个过程还需要线粒体提供能量B错误;乙是浆细胞,丙是记忆B细胞,丙可以在抗原消失后很长时间内保持对这种抗原的记忆,当再接触这种抗原时,能迅速增殖、分化形成浆细胞,快速产生大量的抗体,参与二次免疫,C错误;人体免疫的第三道防线主要是由免疫器官和免疫细胞借助血液循环和淋巴循环而组成的,甲为B细胞,吞噬细胞不属于淋巴细胞,B细胞和吞噬细胞都属于免疫细胞、二者参与特异性免疫,D错误

【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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