题干

在生命系统的结构层次中,由小到大的顺序正确的是  (   )

A:生物体→种群→群落→生物圈→生态系统

B:生物体→种群→群落→生态系统→生物圈

C:种群→群落→生物体→生态系统→生物圈

D:生物圈→生态系统→种群→群落→生物体

上一题 下一题 0.0难度 选择题 更新时间:2012-08-22 05:02:42

答案(点此获取答案解析)

B

同类题4

阅读下列材料,回答问题:

材料一:福建船政学堂各专业课程例举

1866年闽浙总督左宗棠奏设福建船政学堂于马尾。学堂初期成效显著。1884年中法战争,船厂被毁,学堂受损,办学困难,至辛亥革命后拆改。学校采用班级制,并据学生情况,及时调整学习班级和专业。第一届驾驶班学生海上实习长达4月:去时教习躬督驾驶,各练童逐段誊注日记,量习日度、星度,体认精熟。归时各童自行轮班驾驶,教习默察其手足、神色,以分优劣。“求是堂艺局章程”规定了学生作息、考核、待遇、奖惩、出路等内容,并严格执行。为“精益求精”,学堂共选派四批优秀生赴欧留学。归国留学生在近代海军和教育事业中也大显身手。如严复任北洋水师学堂总教习和总办达20余年。历史学家唐德刚也有言“空前绝后鸭绿江口黄海大战,俨然马尾船校以一校大战日本一国!”

——摘编自《论福建船政学堂与福建教育的近代化》等

材料二:20世纪二三十年代,由于外侵内战,中国农村经济萧条、民生凋敝的状况日益严重。一批有识之士纷纷为救活中国农村而加紧奔波,代表人物包括梁漱溟、晏阳初、黄炎培等。史称“乡村建设运动”。梁漱溟的邹平乡村建设实验最初从兴办乡农学校(不久改称民众学校)、成立农业合作社、改良农业这三个方面展开,体现的正是上述培育现代合格村民的思路。他创立的乡村建设研究院采取了兴办乡农学校的方式来实施村民教育。1932年1月,训练部派师生300余人分赴各区乡,兴办乡农学校。这年冬天,全县共办起乡农学校91处,参加学习的村民3996人。乡农学校起初设在条件较好的大村,每区5~8处,后来发展到几个小村合办。乡农学校接受研究院指导,学校辅导员全部由训练部学生担任。村民学习以3个月为期,课程为三民主义、精神陶冶、识字、史地、乡村自卫、农业科技等。除正规乡农学校外,一些村立小学还附设了乡农夜校,教育对象为全村男女老幼,学习内容为识字、时事、农业知识等。截至1933年冬,全县共开办了156处夜校,参加夜校的农民共5241人。另外,一些村还设立了女子部或女校,向农村妇女传授家事、卫生及育儿知识。

——宋乐颜《邹平的成年教育》第15期,1937年4月16日

同类题5

    Your junior high school years are coming to an end. After the big exam, most of you will go on to study in a senior school. What are you expecting from senior high school? Let's hear some teen readers talk about it.
Zhou Zhijie, 15, from Shanghai:
    I have heard that although Senior 3 is a hard year, Senior 1 and Senior 2 are less stressful. I hope there'll be time then to enjoy sports. There will be plenty to see. Especially, the World Cup in Brazil is coming. We can watch football matches. I'm sure I'll really enjoy it.
Jin Xi, 16, from Harbin, Heilongjiang:
    I really enjoy science. I visit many science exhibitions. I am interested in UFOs, too. I'm crazy about making model planes, although I'm not very good at it because I don't really have enough scientific knowledge. I'll be learning more science in senior high school. In a word, sometime in the future I'm going to build an excellent model plane!
Wang Yaling, 15, from Xiamen, Fujian:
    I hope I can be taller in senior high school. I'm only 155cm. Many people grow faster in senior and I hope I will, too. I want to be 162cm. But I'm not sure about that, since most girls in my family don't grow taller than 160cm. I hope I'm different.
Zhang Fang, 15, from Hebi, Henan:
    I expect that I'll make more friends in senior high school. I study in a middle school in the country. Most of my classmates live nearby. In senior high school, I'll meet different people from different areas. I hope I can learn new things from them.
根据材料内容选择最佳答案,并将其标号填涂在答题卡的相应位置。