试题与答案

（10分）（1）写出下列物质在水溶液中的电离方程式 氢氧化钡硫酸铝 （2）写出下

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题型：填空题

题目：

（10分）（1）写出下列物质在水溶液中的电离方程式

氢氧化钡                         硫酸铝                      

（2）写出下列反应的离子方程式或化学方程式：

硫酸溶液与澄清的石灰水混合                                      

碳酸氢钠溶液与稀盐酸混合                                        

MgO + 2H+ ==Mg2+ + H2O_____________________________________________

答案：

考点：离子方程式
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题型：问答题

【背景材料】

某高层办公楼，总建筑面积137 500m2，地下3层，地上25层。业主与施工总承包单位签订了施工总承包合同，并委托了工程监理单位。

施工总承包单位完成桩基工程后，将深基坑支护工程的设计委托给了专业设计单位，并自行决定将基坑支护和土方开挖工程分包给了一家专业分包单位施工。专业设计单位根据业主提供的勘察报告完成了基坑支护设计后，立即将设计文件直接给了专业分包单位。专业分包单位在收到设计文件后编制了基坑支护工程和降水工程专项施工组织方案，方案经施工总承包单位项目经理签字后即由专业分包单位组织了施工，专业分包单位在开工前进行了三级安全教育。

专业分包单位在施工过程中，由负责质量管理工作的施工人员兼任现场安全生产监督工作土方开挖到接近基坑设计标高(自然地坪下8.5 m)时，总监理工程师发现基坑四周地表出现裂缝即向施工总承包单位发出书面通知，要求停止施工并要求立即撤离现场，施工人员查明原因后再恢复施工。但总承包单位认为地表裂缝属正常现象，没有予以理睬。不久基坑发生了严重坍塌，并造成4。名施工人员被掩埋，经抢救3人死亡、1人重伤。事故发生后，专业分包单位立即向有关安全生产监督管理部门上报了事故情况。经事故调查组调查，造成坍塌事故的主要原因，是由于地质勘察资料中未表明地下存在古河道，基坑支护设计中未能考虑这一因素而造成的。事故造成直接经济损失80万元，于是专业分包单位要求设计单位赔偿事故损失80万元。

【问题】

1．请指出上述整个事件中有哪些做法不妥？并写出正确的做法。

2．三级安全教育是指哪三级？

3．本起事故可定为哪种等级的事故？请说明理由。

4．这起事故中的主要责任者是谁？请说明理由。
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题型：单项选择题

The European online fashion business is fierce. Just ask backers of one-time highfliers. Like boo. com, the urban sportswear retailer that tanked last year, and dressmart, com, the struggling men’s wear specialist. Those once stellar online brands expanded too fast, spent much more than they earned, and then lost their investor support after Internet stocks began plummeting last April. The markets sent online fashion stores a tough message: come up with business models that generate revenues.
A few firms have shown that not all online fashion shops are Internet disasters. Copenhagen-based haburi, com, the online designer-label discount store, Sweden’s sportswear vendor Sportus and the Italian shirts store Marco Bracci are doing well in a very tough environment.
Haburi’s distinctive business model is an Internet version of the factory outlet where brand manufacturers sell directly to consumers at lower prices from huge out-of-town shopping malls. A concept used in the U. S. far more than in Europe, and Haburi wants to fill the gap. Michael Vad, Haburi’s CEO, says that Europe’s apparel factory outlet sector could yield $10 billion in sales annually.
According to Vad, national regulations that limit malls outside city centers have hampered the development of this sector. "For the consumer, there is the two-hour drive to the mall, and when you get there, you don’t know whether you will get the size or color you want," says Vad. By going online, Haburi aims to cut the retailer’s costs, save consumers the long drive, and deliver orders within two or five days. Haburi splits net revenue 50-50 with the brand manufacturers.
Apparel is difficult to sell online because people like to feel and touch the clothes they buy. For the online retailer, acquiring the items, inspecting them, cleaning and storing them can be expensive. "The cost of customer service in the apparel business is much higher than selling books or even furniture," says Matthew Nordan, a retail analyst at Forester Research’s Amsterdam office.
Unless linked to a major established operation, an online retailer needs a competitive edge. For example, Italian shirt-maker Marco Bracci sells expensive goods for high profits and has cornered a niche market. Dressmart, on the other hand, tried to do too much too soon. Originally it planned to sell only shirts and to make the original Swedish operation profitable before branching out. But within months it tried to go pan-European and sell everything including ties, shoes and sportswear, and to rent physical outlet at airports. Dressmart, on the verge of bankruptcy and searching for a backer, has now scaled back and operates only in Sweden.

What can be inferred from the passage

A．A better way for online business is to do it on a small scale.

B．Most of the investors are near-sighted in online business.

C．It is a wise thing to do online business other than fashion clothes.

D．Online business must link to a big successful enterprise.
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