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在某些国外进口的瓦斯计的刻度板上,有“LEL”的字母,此字母是()的缩写。
A.可燃性气体爆炸下限
B.可燃性气体爆炸上限
C.可燃性气体爆炸
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A.可燃性气体爆炸下限
B.可燃性气体爆炸上限
C.可燃性气体爆炸
A.国外进口钢材
B.钢材混批
C.板厚等于或大于30mm,且设计有Z向性能要求的厚板
D.建筑结构安全等级为一级,大跨度钢结构中主要受力杆件所采用的钢材
E.对质量有疑义的钢材。
A.延迟跳闸
B.改接信号
C.误动发信号
D.误动跳闸
A.将光功率计的测试尾纤一端连接到光接口板的“Rx”口,并将尾纤的另一端连接到光功率计上
B.光功率计经过校准
C.重复多次,检查测得的平均发送光功率的最大值和最小值是否符合技术要求
D.光纤接头和光接口板面板上的光连接器清洁并连接良好
A.一台断路器控制两台变压器,其中一台转为备用时;
B.变压器在低温运行时;
C.变压器在运行中滤油、补油、或换潜油泵更换净油器的吸附剂时;
D.当油位计的油面异常或呼吸系统有异常现场,需要打开放气或放油阀门时
(1)国内价格将是多少?
(2)国内生产者和消费者的损益各为多少?
(3)对无谓损失和国外生产者会产生什么影响?
Example 9.5 (page 308 ) describes the effects of the sugar quota. In 2005 , imports were limited to 5.3 billion pounds , which pushed the domestic price to 27 cents per pound. Suppose imports were expanded to 10 billion pounds.
a What would be the new U. S. domestic price?
b. How much would consumers gain and domestic producers lose?
c. What would be the effect on deadweight loss and foreign producers?