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【简答题】
如果变量 X 与 Y 之间没有线性相关关系,则( ) A. 相关系数r= 0 B. 相关系数r= 1 C. 估计标准误差等于0 D. 估计标准误差等于1 E. 回归系数b=0
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【单选题】A wholesale food retailer is offered $15.60 per two-layer carton for 5000 cartons of peaches. The wholesaler can buy peaches from their growers at $13.20 per carton. Shipping costs $2.40 per carton, f...
A.
No, the costs are $1500 more than the benefits.
B.
No, the costs and the benefits are the same.
C.
Yes, the costs are $2500 less than the benefits.
D.
Yes, the costs are $2000 less than the benefits.
【单选题】确定终凝时间是为了保证()。
A.
施工进度
B.
混凝土运输
C.
混凝土浇捣
D.
混凝土搅拌
【单选题】清洁剂的发放一般由( )专门负责。
A.
客房部秘书
B.
仓管员
C.
楼层服务员
D.
领班
【单选题】《诗经》中以婚姻为主题的诗主要集中在()。
A.
《大雅》
B.
《小雅》
C.
《国风》
D.
《颂》
【单选题】《诗经》中以婚姻爱情为主题的诗主要集中在( )
A.
《小雅》
B.
《大雅》
C.
《国风》
D.
《颂》
【多选题】被征地农民社会保障资金要专款专用,独立核算,任何部门、单位和个人都不得()。
A.
挤占
B.
截留
C.
挪用
D.
转借
【单选题】A wholesale food retailer is offered $15.60 per two-layer carton for 5000 cartons of peaches. The wholesaler can buy peaches from their growers at $13.20 per carton. Shipping costs $2.40 per carton, f...
A.
No, the costs are $1500 more than the benefits.
B.
No, the costs and the benefits are the same.
C.
Yes, the costs are $2500 less than the benefits.
D.
Yes, the costs are $2000 less than the benefits.
【单选题】如订购超过5000 美元,我们愿意给你方3%的特殊折扣。
A.
If order over 5000 USD, we would like to give you 3% discounts.
B.
If you order over USD5000, we will give you a discount of 3%.
C.
We would like to allow you a special discount of 3% on an order of over USD $5,000.
D.
We would like to allow you a special discount of 3% for an order of over 5,000 US
【单选题】清洁剂的发放一般由( )专门负责,每天下班前补充。
A.
值班经理
B.
主管
C.
领班
D.
大堂副理
【单选题】Over $5000...for a children's hospital in the past several months.
A.
was raised
B.
has raised
C.
would be raised
D.
has been raised
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