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养鸡场鸡舍中清晨和傍晚用稳定的灯光延长光照时间.以提高产蛋率

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  • 【名词&注释】

    雌激素(estrogen)、企业家(entrepreneur)、产蛋率(laying rate)、养鸡场(fowl run)、密切相关(closely related)、正在进行(be doing)、植物界(plant kingdom)

  • [多选题]养鸡场鸡舍中清晨和傍晚用稳定的灯光延长光照时间.以提高产蛋率。下列分析正确的是

  • A. 延长光照刺激可直接通过体液调节提高产蛋率
    B. 鸡的产蛋率与体内的雌激素水平密切相关
    C. 鸡的产蛋行为受神经调节和体液调节共同作用
    D. 鸡的产蛋行为受遗传因素和环境因素共同影响

  • 查看答案&解析 点击获取本科目所有试题
  • 举一反三:
  • [单选题]塔赫他间等人用( )来解释植物界(plant kingdom)的系统发生。
  • A. 真花学说
    B. 假花学说
    C. 幼态成熟学说
    D. 单元说

  • [单选题]——Guess what ,we’ve got our visas for a short —term visit to the UK this summer. ——How mice! you a different culture then.
  • A. will be experiencing
    B. have experienced
    C. have been expriencing
    D. will have experienced

  • [单选题]
  • A. elean
    B. read
    C. turn
    D. count

  • [单选题]请听第7段材料,回答第9至11题。第9题:What is the purpose of this talk?
  • A. To talk about the exam
    B. To introduce a professor
    C. To explain the arrangement

  • [多选题]第二节: Bryan、Olga、Scott、Anna 和David正在进行(be doing)一项“企业家成功秘诀调查”。他们将采访几位企业家。第61-65题是他们拟定的采访话题。阅读下面刊登在Entrepreneur(《企业家》)杂志上6位企业家的成功感言(
  • A.
    B.
    D.
    E. E和
    F. Bryan: What comes first, the customer or the profit?
    G. 62. Olga: How important is an entrepreneur’s ambition to his/her company’s growth?

  • [单选题]The lady welled around the shops_______, an eye out for bargains.
  • A. keep
    B. kept
    C. keeping
    D. to keep

  • [单选题]Cindy shut the door heavily and burst into tears. No one in the office knew shewas so angry.
  • A. where
    B. whether
    C. that
    D. why

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