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【多选题】
设计全价配合饲料配方的方法有（）。A.
方形法
B.
代数法
C.
试差法
D.
线性规划法
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反馈参考答案：
举一反三
【简答题】What’s the type of the movie and what is it about?
【单选题】What do we know about the man?
A.
He wants to have a job.
B.
He will go on with his studies.
C.
He is a slow student.
D.
He doesn't know what to do.
【单选题】What did Bob worry about?
A.
He worried about his life after being fired.
B.
He worried that his children would not work hard in their studies.
C.
He worried about the lack of chance to cook.
D.
He worried that he couldn’t be an athlete.
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