问题 单项选择题

有关锅炉安全阀的调整,以下说法正确的是()

A、锅炉安全阀的开启压力一般调整在不大于1.5倍的工作压力,最大不应超过设计压力

B、锅炉安全阀的关闭压力应不影响主机以及重要辅助机械的正常使用,对于主锅炉,一般不低于90%的工作压力

C、过热器安全阀应设定在饱和蒸汽安全阀以后打开

D、对安全阀的手拉开启装置无需检验

答案

参考答案:B

阅读理解

D

  Just outside the northern Italian town of Bra, there rises a church tower with a clock that is a half hour slow. Though not far from the industrial city of Turin,Bra smells of roses,and leisure(悠闲)is the law. It is both the home of an international movement that promotes slow food and one of Italian cities that have joined the slow cities. In Bra, the population is 27,866. The town fathers have declared that all small food shops be closed every Thursday and Sunday. They forbid cars in the town square. All fruits and vegetables served in local schools must be organic(有机的). And as the movement goes well,the slow concept gradually spreads across Europe.

  The argument for a Slow Europe is not only that it is good,but also that it can work. The Slow City Movement, which started in 1999,has improved local economies(经济)by promoting local goods and tourism. Young Italians are moving from larger cities to Bra,where unemployment is only 5 percent,about half the nationwide rate. Slow food and wine festivals draw thousands of tourists every year. Shops are doing well,many with sales rising at a rate of 15% per year.“This is our answer to the world,”says Paolo Saturnini,the founder of Slow Cities.

  France is in favor of slow economics. Most outsiders have long been doubtful of the French model:short hours and long vacations. Yet the French are more productive than those in the United States and Britain,and have been for years.

  The mystery of French productivity has risen an Europe-wide debate about the advantages of working more slowly.

63.The church clock that is a half hour slow serves as a symbol of __________.

A.industrial development           B.slow movement

C.global economy             D.city growth

64.The low unemployment in Bra proves that__________.

A.the population is not large

B.tourism brings great job chance

C.the Slow City Movement is successful

D.the slow concept works well only in its birthplace

65.It can be inferred from the passage that__________.

A.British workers work longer hours than the French

B.French workers work longer hours than the Italians

C.Italian workers are less productive than the Americans

D.American workers are more productive than the British

66.The increased French productivity tends to__________.

A.favor a fast life style

B.throw doubt on slow economics

C.encourage a slow economic growth

D.confirm advantages of slow economics

单项选择题 案例分析题