下面四个氯化反应哪个不宜用作实验室制取纯净的氯化合物?() A.环丙烷的氯化; B.

题型:单项选择题

问题:

下面四个氯化反应哪个不宜用作实验室制取纯净的氯化合物?()

A.环丙烷的氯化;

B.乙烷的氯化;

C.异丁烷的氯化;

D.新戊烷的氯化。

考点:机动车维修技术有机化学基础知识有机化学基础知识题库
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以下情况属于工程质量事故的是()。

A.一在建工程的混凝土构造柱拆模后发现孔洞,施工单位根据监理单位要求进行了返工处理,经核算总费用为3500元

B.一在建工程的混凝土剪力墙拆模后发现大面积孔洞,施工单位根据监理单位要求进行了返工处理,经核算总费用为6500元

C.某在建工程主体施工中,一层模板垮塌造成一死一伤

D.卫生间止水带浇筑时混凝土拌合物产生离析现象仍浇筑入模而造成返工损失1500元

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The London 20120lympics are being praised as a sporting and logistical(后勤)success,but the influence on economy is far less certain.Some London tourist attractions,businesses and hotels reported that their business actually fell during the Games.But as Olly Barratt reports from London,the overall UK economy is looking for long-term results.

Showing an Olympic-sized party like this cost the UK almost l 5 billion dollars.But while spectators went to east London’S Olympic Park,central London has been much quieter than。normal. Arthur lRason,a central London stallholder,said,“Am I taking less? Yeah,I’m taking less.There’S no question about it.”

Restaurants were among businesses that reported lower takings than normal at this time of year.And one tourism trade association says a survey of its members found the Games had  had a negative influence all over the UK.But during the recent recession(不景气),British officials still insist the Games were worth it.Boris Johnson,Mayor of London said,“I think it’S been an amazing display of what you can do if you plan and you work for years and years on a project.

And I think it’s a great advertisement for British engineering and British industry."    The government hopes the Games will be a great help to the British brand worldwide,and they are also an opportunity to sweet-talk potential investors from all over the world.And a fall in takings for some attractions should not have come as a surprise.

小题1:Where is the London’S Olympic Park located?

A.Central London.

B.East London.

C.West London.

D.Outside London.小题2:Mayor of London thinks the Games’effect on British economy is——.

A.positive

B.disappointing

C.negative

D.uncertain小题3:What can we learn from the text?

A.The British government did badly in organizing the Games.

B.Businesses in central London were improved during the Games.

C.Most British businessmen thought poorly of the London Games.

D.Most British officials were worried about the future of British economy.

题型:单项选择题

下面哪个参数属于材质的动力学属性?()

A.Bounce Coefficient

B.Static Friction

C.Sliding Friction

D.Friction Coefficient

题型:单项选择题

异丙肾上腺素的作用有()。

A.收缩血管、舒张支气管、增加组织耗氧量

B.收缩血管、舒张支气管、降低组织耗氧量

C.舒张血管、舒张支气管、增加组织耗氧量

D.舒张血管、舒张支气管、降低组织耗氧量

E.舒张血管、收缩支气管、降低组织耗氧量

题型:单项选择题

试述 * * 穹的位置及临床意义。

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