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土壤养分有效性最好、最有利于作物生长的土壤pH范围是( )

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  • 【名词&注释】

    白蛋白(albumin)、自行车(bicycle)、内脏器官(internal organs)、比较级(comparative degree)、淋巴管(lymphatic)、血浆胶体渗透压(colloidal osmotic pressure)、第一个(first)、脊神经后根(posterior root of spinal nerve)、脊神经前根(anterior spinal roots)、实质性器官(parenchymatous organ)

  • [单选题]土壤养分有效性最好、最有利于作物生长的土壤pH范围是( )

  • A. 4.0~5.0
    B. 6.0~7.0
    C. 8.0~9.0
    D. 10~11

  • 查看答案&解析
  • 举一反三:
  • [单选题]Passage FiveMost famous people have some unusual story associated with their names. Casanova, for example, was a legend in his own time. He was the epitome of the gallant adventurer and lover. However, he spent thirteen years of his life as a librarian!
  • A. Thomas Edison, the brilliant inventor, was deaf from the age of twelve. The young Edison's hearing loss was long believed to have been caused when he tried to catch a moving train and a conductor grabbed him by the ears to pull him on board. Edison himself liked to tell this story. No one is really sure how he did lose his hearing.
    B. Great writers and artists often require various types of inspirational warm-up before they create. Rudyard Kipling could not write unless his pen was filled with black ink, and only black ink. Ludwig van Beethoven poured icy cold water over his head before he composed his music. He felt that the cold water would refresh his brain. The author Charles Dickens always faced north when working or sleeping. Tycho Brahe, an important Danish astronomer, had his nose shot off in a duel with a Danish nobleman in 1566. He replaced it with another nose made of gold. President James Garfield could simultaneously write Latin with one hand and Greek with the other.
    C. 52. This passage is about famous ______.
    D. scientists
    E. personalities
    F. composers
    G. leaders

  • [单选题]下列关于内脏器官的叙述,正确的是( )
  • A. 都位于胸、腹、盆腔内
    B. 中空性器官一般分3层结构
    C. 中空性器官结构中的肌层,一般排列为内纵外环两层
    D. 实质性器官(parenchymatous organ)都形成凹陷的门,为血管、淋巴管、神经和导管出入之处
    E. 以上都不正确

  • [单选题]血浆胶体渗透压主要由下列哪种物质形成的( )
  • A. 无机盐
    B. 葡萄糖
    C. 白蛋白
    D. 纤维蛋白
    E. 血细胞

  • [单选题]I learned to ______a bicycle as a small boy.
  • A. drive
    B. run
    C. operate
    D. ride

  • [单选题]The foreigners once ______their products to our company at a ______higher price.
  • A. sent, very
    B. lent, still
    C. sold, much
    D. showed, more

  • [单选题]由感觉神经元中枢突组成的是( )
  • A. 前角
    B. 后角
    C. 脊神经前支
    D. 脊神经前根(anterior spinal roots)
    E. 脊神经后根(posterior root of spinal nerve)

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