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【单选题】
调节呼吸的最重要生理因素是:A.
O2
B.
CO2
C.
[H+]
D.
2,3-二磷酸甘油酸
E.
CO
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【简答题】Sue has a cat. She likes playing w 1 it at home. But she's seven now and her father tells her to go to school. The teacher does not let her t 2 the cat into the classroom. She has to leave it at home,...
【简答题】动物疫病是指动物传染病和 病。
【单选题】我国已消灭的动物疫病是指（ ）等在我国曾发生过，但已扑灭净化的动物疫病
A.
牛瘟、猪瘟、猪丹毒
B.
新城疫、牛肺疫
C.
牛瘟、蓝舌病、猪肺疫
D.
牛海绵状脑病、牛肺疫
E.
牛瘟、牛肺疫
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