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【单选题】
高压断路器发生跳闸失灵的故障原因,从电气方面分析,不能可是下列哪种情况造成的( )。A.
操作电源电压是否过低
B.
分闸回路断路
C.
合闸线圈烧毁
D.
断路器触头熔焊
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【简答题】You are a tour guide. A tourist of your group suffers at night from high fever after catching cold and call you for helping taking him to hospital for emergency treatment. (游客感冒高烧,帮忙送医院进行紧急治疗,和游客进行对话)...
【单选题】Raisin bran and milk are complements. An increase in the price of raisins will
A.
increase consumer surplus in the market for raisin bran and decrease producer surplus in the market for milk.
B.
increase consumer surplus in the market for raisin bran and increase producer surplus in the market for milk.
C.
decrease consumer surplus in the market for raisin bran and increase producer surplus in the market for milk.
D.
decrease consumer surplus in the market for raisin bran and decrease producer surplus in the market for milk.
【单选题】Raisin bran and milk are complementary goods. A decrease in the price of raisins will
A.
increase consumer surplus in the market for raisin bran and decrease producer surplus in the market for milk.
B.
increase consumer surplus in the market for raisin bran and increase producer surplus in the market for milk.
C.
decrease consumer surplus in the market for raisin bran and increase producer surplus in the market for milk.
D.
decrease consumer surplus in the market for raisin bran and decrease producer surplus in the market for milk.
【简答题】Transfer 模型的功能是什么?
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