如果显示器在室内湿度低于30%的环境中运行,因显示器机械摩擦部分在湿度低的环境中特别

题型:问答题

问题:

如果显示器在室内湿度低于30%的环境中运行,因显示器机械摩擦部分在湿度低的环境中特别容易产生静电干扰,内部元器件会被静电破坏,这样就影响了显示器的正常工作。而在湿度高于80%的环境中,显示器则因内部的电源变压器和一些线圈受潮而产生漏电,显示器内部的元器件在受潮的情况下容易生锈、腐蚀等的问题,易发生短路现象。

考点:计算机等级考试MSOffice一级MSOffice笔试
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鱼与水中生活相适应的两个重要特点是:一是能靠______来获得食物和防御敌害;二是能在水中______.

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编制可行网络计划的步骤是( )。

A.优化与“绘制”正式网络计划

B.网络计划的实施与调整;控制与调整

C.检查与调整;绘图并形成可行网络计划

D.检查和数据采集;优化

题型:问答题

甲状舌管囊肿及瘘手术的治疗原则是:()

A.切除囊肿及瘘,留置引流,促进愈合

B.切除囊肿、瘘及相关的舌骨和舌根组织

C.切除囊肿、瘘管近舌根部处,结扎闭合舌盲孔

D.清除囊壁和瘘管,缝合切口

E.上述都不是

题型:问答题

In 1993, New York State ordered stores to charge a deposit on beverage (饮料) containers. Within a year, consumers had returned millions of aluminum cans and glass and plastic bottles. Plenty of companies were eager to accept the aluminum and glass as raw materials for new products, but because few could figure out what to do with the plastic, much of it wound up buried in landfills (垃圾填埋场). The problem was not limited to New York. Unfortunately, there were too few uses for second-hand plastic.

Today, one out of five plastic soda bottles is recycled (回收利用) in the United States. The reason for the change is that now there are dozens of companies across the country buying discarded plastic soda bottles and turning them into fence posts, paint brushes, etc.

As the New York experience shows, recycling involves more than simply separating valuable materials from the rest of the rubbish. A discard remains a discard until somebody figures out how to give it a second life—and until economic arrangements exist to give that second life value. Without adequate markets to absorb materials collected for recycling, throwaways actually depress prices for used materials.

Shrinking landfill space, and rising costs for burying and burning rubbish are forcing local governments to look more closely at recycling. In many areas, the East Coast especially, recycling is already the least expensive waste-management option. For every ton of waste recycled, a city avoids paying for its disposal, which, in parts of New York, amounts to savings of more than $100 per ton. Recycling also stimulates the local economy by creating jobs and trims the pollution control and energy costs of industries that make recycled products by giving them a more refined raw material.

It can be concluded from the passage that ().

A. rubbish is a potential remedy for the shortage of raw materials

B. local governments in the U. S. can expect big profits from recycling

C. recycling is to be recommended both economically and environmentally

D. landfills will still be widely used for waste disposal

题型:问答题

肝右前叶包括()

A.Ⅱ段+Ⅲ段

B.Ⅲ段+Ⅳ段

C.Ⅵ段+Ⅶ段

D.Ⅴ段+Ⅷ段

E.Ⅴ段+Ⅵ段

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