堕胎、小产的发病机制是（）

[问答题]Questions 1 to 5 are based on the following passage.　　Good news: Olympic chiefs visit London. Bad news: they’ll be traveling by Tube　　It’s crunch week for London’s bid to host the 2012 Games　　BY ANDREW JOHNSON and JONATHAN THOMPSON　　Commuters waiting at Stratford in East London, Which is the planned site of the 80,000-seat Olympic stadium　　Senior government ministers and British sporting heroes will be on hand to extol the capital’s virtues when the 12-member International Olympic Committee (IOC) team visits this week to assess the London 2012 bid.　　Although much of their four-day visit is expected to be spent in the exclusive Four Seasons Hotel in Canary Wharf grilling bid organisers in question and answer sessions, the evaluation commission will spend one day visiting London’s proposed venues—and will take a trip on the Tube. It could prove a costly journey.　　London 2012 organisers, who have spent up to ￡20m on the project, have pencilled in trips to the proposed sites, including the planned stadium at Stratford, the Millennium Dome at Greenwich and the ExCel centre in Docklands.　　However, the commission can insist on being taken anywhere, including the new Wembley stadium, which will host the football, or to the archery venue at Lord’s, or even to Wimbledon or Hackney.　　Earlier this month, the Madrid bid suffered a setback over lack of accommodations, which was criticised by IOC members. Will transport prove Londons’ Achilles’ heel? On Friday The Independent on Sundaysent four reporters on various journeys across London to put the transport infrastructure to the test.　　Questions:　　1．How many people can the London’s planned Olympic stadium hold?　　2．How many International Olympic Committee (IOC) members will visit London and where are they going to have the question and answer sessions?　　3．What does “tube” mean in American English?　　4．Why was Madrid criticised by International Olympic Committee members?　　5．What is the problem which the authors worried about London’s bid to host the 2012 Olympic Games?

[判断题]资产负债表上的时间为一时期数，利润表上的时间为一时点数。（）

[判断题]依法享有进出口经营许可，并且近三年内在经济活动中无违法、违规行为的出口企业可以申请出口商品配额。

[单选题]LES记分时，对于长期性事件发生次数的记分不到半年的应记（）次。

[单选题]某建筑施工单位有50名从业人员。根据《安全生产法》，该单位（）。

[名词解释题]鼓钉纹

[单选题]冻伤后的局部处理（）

[单选题]血管壁由内向外依次分为（）。

[单选题]NET格式为：区域号.SystemID.00，某设备Loopback地址如下：10.23.34.5，该设备NET值为（）

[单选题]旅客列车在双线区间因特殊情况需反方向运行时，须经铁路局（）准许。