犬毛尾线虫病的病原是() A.猪毛尾线虫 B.绵羊毛尾线虫 C.球鞘毛尾线虫 D.狐 发布时间:2017-07-07 01:04 │ 来源:www.tikuol.com 题型:单项选择题 A1型题 问题: 犬毛尾线虫病的病原是()A.猪毛尾线虫B.绵羊毛尾线虫C.球鞘毛尾线虫D.狐毛尾线虫E.兰氏毛尾线虫
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题型:单项选择题 A1型题 雄蛙口角有一对__________,能够鸣叫招引___________。雌雄蛙有__________现象。雌蛙排出_________,雄蛙排出________,两者在_____________结合,形成__________,属于体外受精。 查看答案
题型:单项选择题 A1型题 以城市经济基础理论的观点认为,当城市在发展初期依赖于具有出口能力的企业,则该城市是处于城市发展的______。A.第一阶段——专门化B.第二阶段——综合化C.第三阶段——成熟化D.第四阶段——区域化 查看答案