【单选题】【消耗次数：1】
华枝睾吸虫身体上最发达的器官是（）。
①
A.运动器官
②
B.消化器官
③
C.感觉器官
④
D.生殖器官
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【单选题】
13．公畜生殖器官的大体解剖结构是
①
A．精索内动脉、静脉卷曲，形成蔓状丛致阴囊内温度低于体温4～7℃
②
B．副性腺有前列腺、精囊腺和尿道球腺，但是犬只有前列腺
③
C．阴茎分海绵型(马)、纤维型(牛、羊)和中间型(犬)
④
D．阴茎结构包括阴茎海绵体和尿道海绵体两部分
⑤
E．以上都是
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