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【单选题】
沉淀池积泥区和澄清池污泥浓缩室的容积,应根据进出水的( )含量、处理水量、排泥周期和浓度等因素通过计算确定。A.
浊度
B.
含砂量
C.
悬浮物
D.
有机物
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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,
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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