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【简答题】
在多因素试验中,当 不存在(或不显著时),从各因素的最佳水平的组合即可推论最优组合。
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【简答题】已知向量 OA =(λsinα，λcosα) ， OB =(cosβ，sinβ) ，且α+β=4． （1）求 OA ， OB 的夹角θ的大小； （2）求 | AB | 的最小值．
【单选题】(W: Excuse me, could you show me the way to the Smith Hotel? M : Just walk down this street, and turn right at the second crossing. You will see a hospital on your right. The Smith Hotel is just oppos...
A.
Take her to the Smith Hotel.
B.
Show her the way to the Smith Hotel.
C.
Show her the way to the hospital.
D.
Show her around the hotel.
【单选题】W: Excuse me, could you show me the way to the Smith Hotel? M: Just walk down this street, and turn right at the second crossing. You will see a hospital on your right. The Smith Hotel is just opposit...
A.
Take her to the smith hotel the hotel
B.
Show her the way to the Smith Hotel
C.
Show her the way to the hospital
D.
Show her around the hotel
【单选题】W: Excuse me, could you show me the way to the Smith Hotel? M: Just walk down this street, and turn right at the second crossing. You will see a hospital on your right. The Smith Hotel is just opposit...
A.
Take her to the Smith Hotel,
B.
Show her the way to the Smith Hotel.
C.
Show her the way to the hospital.
D.
Show her around the hotel.
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