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【多选题】
属于产品内在质量问题要求退货或换货,质检部门出具 ,经主管部门同意后可退货或换货A.
检验证明
B.
试验记录
C.
换货通知
D.
退换证明
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举一反三
【单选题】Which of the following actions may NOT be considered as a way of non-verbal communication?
A.
Gazing at a person longer than usual.
B.
Shifting positions in a chair.
C.
Crossing one's legs.
D.
Yawning in public
【简答题】定义方法时使用的参数是( 形参 ),调用方法时使用的参数是( )。
【简答题】某家具厂生产桌子和椅子两种家具,桌子售价50元/个,椅子销售价格30元/个,生产桌子和椅子要求需要木工和油漆工两种工种。生产一个桌子需要木工4小时,油漆工2小时。生产一个椅子需要木工3小时,油漆工1小时。该厂每个月可用木工工时为120小时,油漆工工时为50小时。问该厂如何组织生产才能使每月的销售收入最大?(建立模型不计算)
【单选题】Which of the following central bank actions would be appropriate to combat rapid inflation?
A.
A reduction in the discount rate
B.
A reduction in reserve requirements
C.
A cut in taxes
D.
A sale of government securities
【简答题】某家具厂生产桌子和椅子两种家具,它们都要经过木工和油漆两道工序.已知每张桌子要耗费木工 4 小时,油漆工 2 小时,售价 50 元;每把椅子要耗费木工 3 小时,油漆工 1 小时,售价 30 元,两道工序现有工时量分别为 120 小时和 60 小时.问题是如何安排生产才能使销售收入最大 ? ( 1 ) 建立该问题的模型; ( 2 ) 写出该问题的对偶问题.
【单选题】In a refrigeration system, which of the following statements describes the actions occurring when a solenoid valves, used in conjunction with an unloader head is energized? .
A.
The solenoid valves directs high pressure gas to the valve lifting device raising the suction valve off its seat and causing one specific cylinder to become unloaded
B.
The solenoid valves directs high pressure gas to the underside of the unloading piston, causing it to rise and allowing the recirculating ports to be opened
C.
When the solenoid valve becomes energized, the valve ports become closed, allowing discharge pressure to build up above the piston, shifting it and causing it to unload
D.
The solenoid valve allows the refrigerant to pass from the suction chamber to the top of the unloader piston, causing the piston to lift and unload the cylinder
【简答题】定义方法时使用的参数是( ),调用方法时使用的参数是( )
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