完全垄断行业的主要特征是行业中的企业数量为( )。A．1家 B．少量 C．较多 D

将下面备选的几句话，衔接在后面几个有引语的句子后面，只填番号。（5分）

A．人是自然界的产物，人的生命现象是自然现象的一部分，人与自然是一个不可分割的整体，它们遵循着同一自然规律。

B．扬州属于那种“贵人多难”一类，但每遭蹂躏之后，它总能顽强地恢复生气。

C．人只有到山水之中，从自然的千姿百态里才能领会“道”之真味。

D．看到一封来信，感到很亲切，如见其人，自古以来就是这样。E. 演员演岳飞就应该像岳飞，演秦桧就应该像秦桧。

①《内径》上说：“人与天地相参”，“善言天者，必验于人。”(        )

②北朝人曾经说过：“尺牍素书，千里面目。”(        )

③宗炳有一句话：“山水以形媚道。”(        )

④俗话说：“装龙像龙，装虎像虎。”(        )

⑤俗话说：“大难不死，必有后福。”(        )

（3分）将33.6L（标况下）乙烯和甲烷混合气体，通入足量的溴水中，充分反应后，水溶液的质量增加了14g。则原混合气体中乙烯与甲烷的体积之比为       

在深度为5的满二叉树中，叶子结点的个数为

A．32

B．31

C．16

D．15

The collapse of Enron, the largest bankruptcy in American history, has rung out a banner year for American business failures. In Europe, the fallout from the Swissair and Sabena insolvencies continues. In the current global slump, more companies are likely to go under. Now is a perfect time to reconsider how to handle such failures: let them sink, or give them a chance to swim

In America, bankruptcy has come to mean a second chance for bust businesses. The famous "Chapter 11" law aims to give a company time to get back on its feet, by shielding it from debt payments and prodding banks to negotiate with their debtor. It even allows an insolvent company to receive fresh finance after it goes bust. On the other side of the Atlantic, when companies stumble, almost as much effort is spent in fingering the guilty as in trying to salvage a viable business. British and French laws, for example, can make a failing company’s directors face criminal penalties and personal liability. Moreover, bankers have the power, at the first sign of trouble, to push a company into the arms of the receivers. Some modest changes are afoot, however. Britain is considering moves that would bring its rules closer to America’s. New laws in Germany should also make it easier to revive sick companies, although trade unions still have their say.

But even with the arrival of the euro and moves towards a single financial market, going bust in Europe is a strictly local affair. Long before America had a single currency, the American constitution provided uniform bankruptcy laws, observes Elizabeth Warren of the Harvard Law School. Europe’s patchwork of national laws, according to Bill Brandt of " Development Specialists", a consultancy, inhibits lending and makes it difficult to fix ailing firms.

Transatlantic insolvencies are even harder, as a Belgian-based software company, Lernout and Hauspie, discovered this year. Its American reorganization plan was thwarted by a Belgian judge, who ordered a sale of the firm’s assets. As the European Union inches toward greater harmonization, should it try to mimic America

Critics of Chapter 11 think not. They argue that America’s bankruptcy system is wasteful, lets failed managers go unpunished, and gives some companies an unfair advantage. In Chapter 11, admittedly, lawyers and advisers gobble up fees, but a recent study argues that the fees are no larger than those for most mergers and acquisitions. One common complaint, that managers enjoy the high life while creditors go begging, fails to stand up to the data from America’s previous wave of bankruptcies in the early 1990s. Stuart Gilson of the Harvard Business School found that more than two-thirds of top managers were ousted within two years of a bankruptcy filing. More troubling is that some American firms seem to enjoy second and third trips to bankruptcy court, cheekily termed Chapters 22 and 33. Some see this as evidence that, ton often, they use Chapter 11 to keep running. But there is more to the story.

The last paragraph is mainly（）

A. to accuse the lawyers and advisers of making big money by helping those insolvent companies

B. to introduce the changes of the bankruptcy law—Chapter 11

C. to prove the accusation is groundless that the managers of bust businesses lead a comfortable life at the cost of creditors

D. to argue that the European Union should not follow the American example in their effort to revive sick companies

某机电安装工程公司承接某汽车厂重型压力机车间机电设备安装工程，工程内容包括：设备监造，压机的就位安装、压力管道安装、电气工程、自动控制工程和单机试运行等。其中压机最高22.5m，单件最重为105吨。合同工期为4个月。合同约定，工期每推迟一天罚10000元，提前一天奖励5000元。

对压力管道的安装，机电安装工程公司项目部在安装前按规定履行了书面告知手续。

该公司项目部对承接工程进行分析，工程重点是压机吊装就位，为此，制定了两套吊装方案：

第一套方案：采用桅杆式起重机吊装。经测算施工时间需要50天，劳动力安排日平均为30人，参照相关规定计算人工日平均工资50元，机械台班费及新购置钢丝绳和索具费用共20万元，其他费用2.5万元。

第二套方案：采用两台1OO吨履带式起重机抬吊。吊车需要租赁，租赁费用1万元/台班，但不发生购置钢丝绳和索具费和其他机械台班费。经测算，现场共需14天，与第一套方案相比人工费可降低70%，其他费用可降低30%。该项目部合理选择了吊装方案，注重安全管理，合理调度，加强了施工阶段的成本控制，尤其对压机吊装成本费用的控制。吊装部队发挥了积极性，如期完成任务，为后面工序创造了良好条件，使该工程项目提前8天完成了施工任务。

按问题4选用的吊装方案，吊装成本降低率是多少？