皮皮学，免费搜题
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【单选题】
根据母猪发情的外部表现和行为，母猪阴户端红肿开始消退、呆立不动时，正处于排卵阶段，是（ ）的最佳时期。A.
饲喂
B.
配种
C.
分娩
D.
哺乳
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皮皮学刷刷变学霸
举一反三
【简答题】A．The professor postponed the exam and will inform. everyone later. B．The professor phoned him about the postponing of the exam. C．The professor canceled the exam. D．The professor put off the exam.
【单选题】Who is Robert Gibert?
A.
A geography professor at Harvard University.
B.
A geography professor at Queen's University.
C.
A geography professor at London University.
D.
A geography professor at Massachusetts University.
【简答题】switch语句中必须有default选项吗?
【简答题】switch 语句中必须有 default 选项码?
【简答题】A．past B．inwards C．ahead D．upside-down
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