【单选题】【消耗次数:1】
GF鸡胚是指
无特定病原菌鸡胚
无菌鸡胚
普通鸡胚
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相关题目
【多选题】 病毒鸡胚接种的部位可以是
①  尿囊膜
②  尿囊腔
③  羊膜腔
④  卵黄囊
【单选题】 副鸡嗜血杆菌引起鸡的传染病是
①  鸡副伤寒
②  传染性鼻炎
③  慢性呼吸道病
④  鸡白痢
【判断题】 按用途分,鸡分为肉用鸡、蛋用鸡、蛋肉兼用鸡和药用鸡等四大类。
①  正确
②  错误
【多选题】 胚泡的结构包括( )
①  滋养层
②  胚泡腔
③  内细胞群
④  透明带
⑤  放射冠
【单选题】 胚泡外表的结构是()
①  滋养层
②  内细胞群
③  胚泡腔
④  透明带
⑤  羊膜
【多选题】 胚泡植入的常见部位是( )
①  子宫颈
②  子宫体
③  子宫底
④  子宫体的后壁
【单选题】 由胚发育而来的根为( )。
①  定根
②  不定根
③  块根
④  气生根
【单选题】 由胚发育而来的根为( )。
①  定根
②  不定根
③  块根
④  气生根
【单选题】 广东肉用鸡以本地鸡味佳,其外形特征表述正确的是( )。
①  颈短,眼细,翼短,脚矮而细
②  毛幼滑,麻黄色,脚衣褐色
③  冠小,尾大而高耸
④  胸部尾部特别饱满,颌下有发达而张开的羽毛
【多选题】 下列哪些病毒可以凝集鸡红细胞
①  鸡禽流感病毒
②  鸡新城疫病毒
③  鸡产蛋下降综合征病毒
④  鸡传染性法氏囊病毒
随机题目
【单选题】 ______ is not the representative writer in the Age of Realism in the literary history of the United States.
①  Henry James
②  Ezra Pound
③  William Dean Howells
④  Mark Twain
【单选题】 Which of the following is not right about Mark Twain’s writing style?
①  ungrammatical and complicated
②  colloquial and concrete
③  remarkable humor
④  deep influence on contemporary writers
【单选题】 After the Civil War America was transformed from ______ to ______.
①  an agrarian community … an industrialized and commercialized society
②  an agrarian community … a society of freedom and equality
③  a poor and backward society … an industrialized and commercialized society
④  an industrialized and commercialized society … a highly developed society
【单选题】 Which of the following is NOT right about Mark Twains style of language?
①  His sentence structures are long, ungrammatical and difficult to read.
②  His words are colloquial, concrete and direct in effect.
③  His humor is remarkable and characterized by puns, straight-faced exaggeration, repetition and anti-climax.
④  His style of language had exerted rather deep influence on the contemporary writers.
【判断题】 The Transcendentalist group includes two of the most significant writers America has produced so far, Emerson and Henry David Thoreau.
①  正确
②  错误
【判断题】 At the Reason and Revolution Period, Americans were influenced by the European movement called Romanticism Movement.
①  正确
②  错误
【判断题】 In the novel Moby Dick, the rebellious struggle of Captain Ahab was thought to be against the white whale.
①  正确
②  错误
【判断题】 In William Cullen Bryant’s poem “Thanatopsis”, the title means view of death.
①  正确
②  错误
【单选题】 About the novel The Scarlet Letter, which of the following statements is NOT right?
①  Its very hard to say that it is a love story or a story of sin.
②  Its a highly symbolic story and the author is a master of symbolism.
③  Its mainly about the moral, emotional and psychological effects of the sin upon the main characters and the people in general.
④  In it the letter A takes the same symbolic meaning throughout the novel.
【单选题】 In the novel Moby Dick, the rebellious struggle of Captain Ahab was thought to be against ____.
①  the white whale
②  the gliding great demon of the seas of life
③  the overwhelming, mysterious vastness of the universe and the awesome forces
④  the savage harpooners and the motley crew