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【简答题】
Suppose that Tang and Wilson must split a fixed 400 pounds of food between them. Tang’s utility function is U T = sqrt ( F 1 ) and Wilson’s utility function is UW = 1⁄2 sqrt ( F 2 ), where F 1 and F 2 are pounds of food to Tang and Wilson, respectively. a. How much utility will Tang and Wilson receive if the food is distributed evenly between them? b. If the social welfare function is U T + U w , then what distribution of food between Tang and Wilson maximizes social welfare? c. If social welfare is maximized when they each obtain the same level of utility, then what is the distribution of food between Tang and Wilson that maximizes social welfare?
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【单选题】施焊的容器、管道内,其氧气含量应在( )。
A.
8%~21%
B.
18%~21%
C.
8%~20%
D.
18%~22%
【单选题】RPE的范围为
A.
6~20
B.
7~20
C.
8~21
D.
6~21
E.
6~22
【单选题】施焊的容器、管道内,其氧气含量应在( )。
A.
8%~21%
B.
18%~21%
C.
18%~20%
D.
18%~22%
【简答题】Seite 20-21, Ü8 überlassen
【单选题】某数控铣床,开机时驱动器出现“编码器的电压太低,编码器反馈监控失效”报警内容,引起这种报警的原因可能是( )
A.
坐标轴的互锁信号生效
B.
伺服电动机加入电枢电压瞬间的干扰
C.
数控系统参数错误
D.
数控系统PLC程序错误
【简答题】Seite 21, Ü9 Entschluss
【简答题】计算下列各题 59+21-8 (59+21)×96-8 (59+21)×(96-8) 9.5+4.85-6.13 40-(2.75+0.86) (75+240)÷(20-5)
【简答题】因为21接近20,所以21×8的结果接近20×8,21×8就约等于______.
【单选题】某数控铣床,开机时驱动器出现“编码器的电压太低,编码器反监控失效”报警内容,引起这种报警的原因可能是()
A.
坐标轴的互锁信号生效
B.
伺服电动机加入电枢电压瞬间的干扰
C.
数控系统参数错误
D.
数控系统PLC程序错误
【简答题】直接写出得数。 (21+ )÷7= 1÷ ÷1= × = (20+ )×8= 0.35×(2+ )= 1÷ - ÷1= ×8÷ ×8= + = ÷ =
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