题目

下列哪个是没有细胞结构的微生物？（    ） A.细菌          B.霉菌          C.病毒           D.酵母菌 答案：C 【解析】 试题分析：细胞是构成生物体的结构和功能的基本单位，但病毒的形体及其微小，它是一类没有细胞结构特殊生物，它们的结构基本相似，一般有蛋白质的外壳和内部的遗传物质组成，像向日葵属于植物，动物、植物、细菌和真菌都是由细胞构成的，只有病毒没有细胞结构。 考点：病毒的结I had the meanest mother in the whole world. While other kids ate candy for breakfast, I had to have porridge, eggs or toast. When others had Cokes and candy for lunch, I had to eat a sandwich. But at least I wasn’t alone when I was sad. My sister and two brothers had the same mean(刻薄的) mother as I did.My mother preferred to know where we were all the time. She had to know who our friends were and where we were going. We had to clean clothes and take a bath every day. The other kids got to wear the same clothes for days. We could not lie in bed “sick” in order to miss school.The worst is yet to come. We had to be in bed by nine each night and get up at eight the next morning. We couldn’t sleep till noon like our friends. So while they slept, my mother was brave to break the Child Labour Law. She made us work. We had to wash dishes, make beds, and learn to cook and all sorts of things at home. I believe she lay awake thinking up all things for us to do.My mother was a complete failure as a mother. Two of her children received higher education. None of us have ever been arrested (taken away by the police) or divorced. She forced us to grow up into educated and honest adults. I am trying to raise my three children this way. I am filled with pride when my children call me “mean”. Why? Because now I thank God every day for giving me the meanest mother in the world.1.How many children does the writer’s mother have?A．Four B．Two C．Three D．Six2.What can you infer(推测) from the passage?A．My family was rich, so I ate a sandwich for lunch.B．My mother was a great success. We love her.C．If we didn’t want to go to school, the best way was to pretend to be sick.D．We needn’t share the housework at home.3.The best title for this passage may be________.A．My childhood B．The meanest motherC．I do as my mother did D．Unforgettable memories