下列哪项不属于小腿慢性溃疡形成的预防措施( )A．治疗足癣B．积极治疗深静脉栓塞C

请仔细观察，结合所学知识回答：

（1）上图反映的是汉武帝时期什么重大历史事件？此事的目的何在？

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（2）这一历史事件在当时产生了怎样的作用？

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（3）伴随着这一历史事件，丝绸之路开通了。按由东向西的顺序写出该路线所经主要地点（至少两点）。该路线的开通，反映了西汉实行怎样的对外政策？

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（4）西汉为保证“丝绸之路”畅通设置了什么机构？它的设置标志着什么？

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（5）今天的亚欧大陆桥东起连云港，西至鹿特丹，被誉为“现代丝绸之路”。请分析一下亚欧大陆桥的经济、政治意义？

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一个圆柱的底面积是30cm²，高是3m，这个圆柱的体积是______cm³．

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．

细胞有丝分裂中期的染色体仅具有1个DNA分子。( )

【背景材料】某办公楼工程共5层，其中二～四层部分轴线上为有粘结预应力梁，其施工顺序有检查锚具（张拉端、固定端）4斤顶，张拉设备，检查砼强度，预应力筋质量，确定张拉顺序，进行张拉，封锚，灌浆等，明确了应有的施工记录资料。

预应力筋张拉时应记录张拉顺序（示意图）、张拉力、伸长值等，并按规定见证张拉，填写（）。

A.预应力钢筋力学性能试验报告

B.预应力钢筋性能检测报告

C.预应力筋张拉记录

D.预应力筋固定、张拉端施工记录