题目

下列关于物质跨膜运输的叙述中，不正确的是(    ) A.同一物质进入不同细胞的方式可以相同，如葡萄糖进入肝脏细胞和骨骼肌细胞 B.不同物质进入相同细胞的方式可能相同，如氨基酸和核苷酸进入小肠上皮细胞 C.同一物质进入不同细胞的方式可能不同，如葡萄糖进入红细胞和小肠上皮细胞 D.不同物质进入不同细胞的方式可能相同，如乙醇进入胃上皮细胞和钾离子进入神经细胞One night, when I was eight, my mother gently asked me a question I would never forget. “Sweetie, my company wants to promote(升职) me; _____ , it needs me to work in Brazil. This is like your teacher telling that you’ve done well and allowing you to skip a grade(跳级), but you’ll have to_____ your friends. Would you say yes to your teacher?” She gave me a hug and asked me to think about it. I was puzzled. The question kept me_______ for the rest of the night. I had said “yes” but for the first time, I realized the difficult decisions adults had to make.For almost four years, my mother would call us from Brazil every day.Every evening I’d anxiously wait for the phone to ring and then tell her every detail of my day. A phone call, however, could never replace her_______ and it was difficult not to feel lonely at times.During my fourth-grade Christmas break, we flew to Rio to visit her.Looking at her large_______ apartment, I realized how lonely my mother must have been in Brazil herself. It was then that I started to appreciate the tough choices she had to make on balancing family and work._____ difficult decisions, she used to tell me, you wouldn’t know whether you make the right choice, but you could always make the best out of the situation, with passion and a positive attitude.Back home, I reminded myself that what my mother could do, I could, too. If she______ to live in Rio all by herself, I, too, could learn to be______ . I learn how to take care of myself and set high but achievable goals.My mother is now back with us. But I will never forget what the_____ has really taught me. Sacrifices(牺牲)pay off in the end. The separation between us has proved to be a______ for me.1.A. besides B. however C. otherwise D. therefore2.A. leave B. refuse C. contact D. forgive3.A. explaining B. sleeping C. wondering D. regretting4.A. patience B. company C. intelligence D. influence5.A. comfortable B. expensive C. empty D. modern6.A. Depending on B. Supplied with C. Faced with D. Concentrating on7.A. managed B. offered C. attempted D. expected8.A. grateful B. energetic C. independent D. practical9.A. question B. experience C. history D. occasion10.A. treasure B. gathering C. failure D. pleasure