按级别分的标准的类型?我国标准分为哪些等级?分别用那些符号表示。

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问题:

按级别分的标准的类型?我国标准分为哪些等级?分别用那些符号表示。

考点:机械工程文献检索文献检索题库
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1993年6月,第( )届国际劳工大会通过了《预防重大工业事故公约》,其中对“重大事故”和“重大危害设施”做出了定义。

A.79

B.80

C.81

D.82

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After a terrible electrical accident,which caused him to become both blind and deaf,the whole world became completely dark and quiet for Robert Edwards for almost ten years. The loss of sight and hearing threw him into such sorrow that he tried a few times to put an end to his life. His family,especially his wife,did their best to tend and comfort him and finally he regained the will to live.

One hot summer afternoon,he was taking a walk with a stick near his house when a thunderstorm started all at once. He stood under a large tree to avoid getting wet,but he was struck by the lightning. Witnesses thought he was dead but he woke up some 20 minutes later lying face down in muddy water at the base of the tree. He was trembling badly,but when he opened his eyes,he could hardly believe what he saw——a plough and a wall. When Mrs Edwards came running up to him,shouting to their neighbors to call for help,he could see her and hear her voice for the first time in nearly ten years.

The news of Robert regaining his sight and hearing quickly spread,and many doctors came to examine him. Most of them said that he regained his sight and hearing from the shock he got from the lightning. However,none of them could give a convincing answer as to why this should have happened. The only reasonable explanation given by one doctor was that,since Robert lost his sight and hearing as a result of sudden shock,perhaps,the only way for him to regain them was by another sudden shock.

小题1:The reason for Robert's attempts to kill himself was that________.

A.a terrible traffic accident happened to him

B.he had to live in a dark and silent world

C.he was struck by the lightning once more

D.nobody in the world cared about him小题2:What was Robert doing when he was struck by the lightning?

A.Sheltering for the rain under a tree.

B.Driving a car.

C.Taking a walk with a stick.

D.Lying on the ground.小题3:What did Robert see first when he regained his sight after the shock?

A.His wife.

B.His neighbours.

C.A plough and a wall.

D.Many doctors.小题4:Which of the following statements is NOT true?

A.Robert had been deaf and blind for nearly ten years.

B.Robert hid himself under the tree for 20 minutes.

C.Robert could hear his wife's shouting for help when he woke up.

D.The family's love helped Robert regain confidence to live.小题5:We can infer from the text that________.

A.there was no accurate explanation for Robert's recovery

B.many doctors came because Robert was badly injured

C.Robert's wife sent for doctors immediately after the shock

D.a sudden injury in the head led to Robert's recovery

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福费廷业务是指包买银行无追索权地买入或卖出因真实贸易背景而产生的()的行为。

A、远期票据

B、应收账款

C、远期票据和应收账款

D、商业承兑汇票和应收账款

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北京安控公司的SZ903D无线压力变送器,最大测量范围0~70MPa,测量精度()级。

A.0.1

B.0.25

C.0.5

D.1

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FOCKE408型条盒透明纸包装机通过()调整电机转速,这样机器的工作速度便可以与上游机器的速度相匹配。

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