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东汉南阳太守杜诗“造作水排,铸为农器,用力少,见功多,百姓便

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  • 【名词&注释】

    基因型(genotype)、苔藓植物(bryophytes)、矿物质(mineral)、表现型(phenotype)、生物体(organism)、黄曲霉菌(aspergillus flavus)、原叶体(prothallus)

  • [单选题]东汉南阳太守杜诗“造作水排,铸为农器,用力少,见功多,百姓便之"。“水排"主要应用于

  • A. 灌溉
    B. 制瓷
    C. 耕种
    D. 冶铁

  • 查看答案&解析 点击获取本科目所有试题
  • 举一反三:
  • [单选题]苔藓植物的孢子萌发形成原叶体(prothallus)。( )
  • A. 正确
    B. 错误

  • [单选题]--- Hi, Terry, can I use your computer for a while this afternoon?--- Sorry. __ .
  • A. It' s repaired
    B. It has been repaired
    C. It's being repaired
    D. It had been repaired

  • [单选题]His efforts to raise money for his program were because no one showed any intention to take a cent out of their pockets.
  • A. in place
    B. in sight
    C. in effect
    D. in vain

  • [单选题]The art show was _______ being a failure; it was a great success.
  • A. far from
    B. along with
    C. next to
    D. regardless of

  • [单选题]People tend to make mistake when ____.
  • A. they perform. several challenging tasks at a time.
    B. new messages are processed one after another
    C. their relationships with others are affected
    D. the tasks require little thought

  • [单选题]What effect does reading have on the author?
  • A. It helps him to realize his dream.
    B. It opens up a wider world for him.
    C. It makes his college life more interesting.
    D. It increases his interest in worldwide travel.

  • [单选题]中国古代,朝廷有时将不在户口册内且因此不纳税的人称为“盗贼”。这反映当时朝廷
  • A. 要求民众纳税 只要求部分民众纳税我 不要求民众纳税 只要求部分“盗贼”纳税

  • [单选题]黄曲霉毒素是主要由黄曲霉菌(aspergillus flavus)产生的可致癌毒素,其生物合成受多个基因控制,也受温度、pH等因素影响。下列选项正确的是
  • A. 环境因子不影响生物体的表现型
    B. 不产生黄曲霉毒素菌株的基因型都相同
    C. 黄曲霉毒素致癌是表现型
    D. 黄曲霉菌(aspergillus flavus)产生黄曲霉毒素是表现型

  • [单选题]人参为著名的补气强壮药,其最主要的药用成分是多种( )。
  • A. 维生素
    B. 氨基酸
    C. 人参皂苷
    D. 矿物质

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