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棉花茎的维管束属于( )。

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  • 【名词&注释】

    基因型(genotype)、人行道(footway)、结合起来、不符合(inconformity)、周木维管束、双韧维管束(bicollateral bundle)、流域面积(basin area)、第一节(first quarter)、维管形成层(vascular cambium)、文章内容(contents of articles)

  • [单选题]棉花茎的维管束属于( )。

  • A. 双韧维管束
    B. 外韧维管束
    C. 周韧维管束
    D. 周木维管束

  • 查看答案&解析 点击获取本科目所有试题
  • 举一反三:
  • [单选题]侧根是维管形成层(vascular cambium)产生的。( )
  • A. 正确
    B. 错误

  • [单选题]从A、B、C、D四个选项中,找出其划线部分与所给单词的划线部分读音相同的选项,1. July
  • A. diary
    B. energy
    C. reply
    D. daily

  • [单选题]某小岛上原有果蝇20000只,其中基因型VV、Vv和vv的果蝇分别占15%、55%和30%。若此时从岛外入侵了2000只基因型为VV的果蝇,且所有果蝇均随机交配,则 代中V的基因频率约是
  • A. 43%
    B. 48%
    C. 52%
    D. 57%

  • [单选题]下列对文章有关内容的表述,不符合原文意思的一顶是(3分)
  • A. 诗在西周言说主体的身份是朝廷官员,所以诗就具有了政坛君臣关系政治言说的性质。
    B. 从周代到战国以前,人们把诗看作是礼乐的一部分,因为它所承载的是礼乐道德的价值取向。
    C. 早期的歌是适合于抒发个体的情感,借助音乐可以使歌便于传播,更广泛地发挥教化的作用。
    D. “诗”在继承了宗教礼乐仪式之歌“音乐+语言”这一形式后,是与音乐就开始结合起来。

  • [单选题]第一节(first quarter):阅读下列短文, 从每题所给的四个选项(A、B、C和D)中,选出最佳选项, 并在答题纸上将该选项标号涂黑。
  • B. When you are little, the whole world feels like a big playground. I was living in Conyers, Georgia the summer it all happened. I was a second grader, but my best friend Stephanie was only in the first grade. Both of our parents were at work and most of the time they let us go our own way.
    C. It was a hot afternoon and we decided to have an adventure in Stephanie’s basement. As I opened the basement door, before we lay the biggest room, full of amazing things like guns, dolls, and old clothes. I ran downstairs, and spotted red steel can. It was paint. I looked beyond it and there, lay even more paint in *** colors like purple, orange, blue and green.
    D. “Stephanie, I just found us a project for the day. Get some paintbrushes. We are fixing to paint.” She screamed with excitement as I told her of my secret plans and immediately we got to work. We gathered all the brushes we could find and moved all of our material to my yard. There on the road in front of my house, we painted bit stripes (条纹) of colors across the pavement (人行道). Stripe by stripe, our colors turned into a beautiful rainbow. It was fantastic!
    E. The sun was starting to sink. I saw a car in the distance and jumped up as I recognized the car. It was my mother. I couldn’t wait to show her my masterpiece. The car pulled slowly into the driveway and from the look on my mother’s face, I could tell that I was in deep trouble.
    F. My mother shut the car door and walked towards me. Her eyes glaring, she shouted, “What in the world were you thinking? I understood when you made castles ** of leaves, ‘and climbed the neighbors’ trees, but this! Come inside right now!” I stood there glaring hack at her for a minute, angry because she had insulted (侮辱) my art.
    G. “Now “go clean it up!” Mother and I began cleaning the road. Tears ran down my checks as I saw my beautiful rainbow turn into black cement.
    H. Though years have now passed, I still wonder where my rainbow has gone. I wonder if, maybe when I get older, I can find my rainbow and never have to brush it away. I guess we all need sort of rainbow to brighten our lives from time to time and to keep our hopes and dreams colorful.
    I. 41. What did the writer want to do when his mother came home?
    J. To introduce Stephanie to her.
    K. To prevent her from seeing his painting.
    L. To put the material back in the yard.
    M. To show his artwork to her.

  • [单选题]I'm tired out. I all afternoon and I don't seem to have finished anything.
  • A. shopped
    B. have shopped
    C. had shopped
    D. have been shopping

  • [单选题]根据图中信息可以判断
  • A. 流域面积(basin area)缩小
    B. 湖泊水位总体下降
    C. 流域主体位于热带荒漠 D.1963年时湖底东南高,西北低

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