蜗轮蜗杆传动有哪些特点?

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问题:

蜗轮蜗杆传动有哪些特点?

考点:挖掘机司机考试高级挖掘机司机高级挖掘机司机题库
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新《电力设备预防性试验规程》中所列试验项目按其试验性值来分,有定期实验、大修试验、查明故障试验、预知性试验等四个方面的试验。

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抑制纤维蛋白溶解的药物是()

A.尿激酶

B.氨甲环酸

C.瑞替普酶

D.阿尼普酶

E.链激酶

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市场分析应达到的目的有()。

A.为项目建设的必要性提供市场依据

B.为项目产品方案提供依据

C.为项目咨询工程师机会研究提供依据

D.为项目建设目的提供依据

E.为确定项目规模提供依据

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It was two years ago today that the hunting ban came into force, supposedly ending centuries of tradition. However, the law has been an unmitigated failure—not that either side is shouting about it.
It was a nightmare vision that struck fear and loathing into the hearts of millions. When the hunting ban became law, it was said, 16,000 people would lose their jobs, thousands of hounds would be put down, rotting carcasses would litter the countryside, hedgerows would disappear, riders would face on-the-spot fines, law-abiding people from doctors to barristers would be dragged from their horses and carted off to prison, while dog owners would be prosecuted if their mutt caught a rabbit.
These were just some of the claims as desperate countryside campaigners battled to save their sport in the lead—up to the hunting ban, which Labour rammed into law using the Parliament Act on November 18, 2004.
For many, the fears were real. Others exaggerated as they fought an increasingly aggressive anti-hunting lobby which had rejected acres of independent evidence affirming that hunting is the most humane way of killing foxes. In the battle to "fight prejudice, fight the ban", every emotive argument was deployed.
For its part, the anti-hunting brigade extravagantly claimed that the ban would put an end to the rich parading in red jackets. A senior Labour MP, Peter Bradley, admitted in this newspaper that it was, as many suspected, about "class war". He lost his seat shortly afterwards. But people in red coats did not disappear.
In fact, none of the forecasts came true. What did happen was something nobody had predicted: the spectacular revival and growth of hunting with hounds. In short, the hunting ban has been a failure.
Today, on the second anniversary of the ban’s coming into force on February 18, 2005, new figures show that participation in the sport has never been higher. It is so cheerful that two new packs have been formed, something that has not happened for centuries.
They include the seductively named Private Pack, set up by the financier Roddy Fleming in Gloucestershire. It operates on an invitation—only basis, a sort of hunting private members’ club. This can only mean one thing: like it or not, hunting is cool. Young people are taking it up, enticed by the element of rebellion and the mystique of what actually happens as hunts attempt to keep within the law.

The anti-hunting lobby held that ______.

A.fox-hunting was an expression of prejudice

B.the countryside campaigners were reasonable

C.the theory of humane killing did not hold water

D.the hunters exaggerated the dreadful scene of hunting

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下列药物中,不能用做抗酸药的是[ ]

A.氢氧化铝

B.氢氧化钠

C.碳酸钙

D.碳酸氢钠

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