煤炭粒级术语中混煤一般是指粒度级别为()mm。 A.0~50 B.0~25 C.25

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问题:

煤炭粒级术语中混煤一般是指粒度级别为()mm。

A.0~50

B.0~25

C.25~50

D.0~13

考点:选煤工程师重介质选煤重介质选煤题库
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在二十世纪中叶中国历史上发生了一件开辟新纪元的大事,据右图回答这件事是什么:

A.祖国统一大业的实现

B.中华人民共和国成立

C.国庆大阅兵

D.解放战争的胜利

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关于汽油机,下列说法正确的是(  )

A.在完成吸气冲程过程中,进气门和排气门都打开

B.在完成压缩冲程过程中,进气门打开,排气门关闭

C.使汽车获得动力的冲程是做功冲程

D.压缩冲程将内能转化为机械能

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风邪的致病特点是
燥邪的致病特点是
寒邪的致病特点是
暑邪的致病特点是
湿邪的致病特点是

A.易伤津耗气

B.多犯阳位

C.易伤肺

D.易伤阳气

E.易阻遏气机

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Beijing: The highly anticipated Beijing-Shanghai high-speed railway will begin operation next year, and is expected to cut travel time to four hours, railway officials said.

The high-speed railway between China's two most important metropolises was scheduled to open in 2012 but will now open one year ahead of time, said Zheng Jian, chief planner with the Ministry of Railways.

Wang Zhiguo, vice-minister of railways, said that it would be a four-hour journey from Beijing to Shanghai, and only three hours from Beijing to Nanjing, capital of East China's Jiangsu province.

At present, it takes about 10 hours to travel from Beijing to Shanghai and Nanjing by train. A new-generation bullet train that will travel up to 380 kilometers per hour (kph) is now under development for the high-speed rail link.

It will be rigorously tested this year, and engineers want the train to run at a top speed of 420 kph to guarantee a safe operational speed of 380 kph, Huang Qiang, chief researcher with the China Academy of Railway Sciences told the Beijing News.

Vice-Minister Wang Zhiguo said it was expected that high-speed trains would one day take passengers from Beijing to most capital cities within eight hours, except for Haikou, Urumqi, Lhasa and Taipei.

It is expected that an 110,000-km railway network will be completed by 2012, including 13,000 km of high-speed rail, he said.

China already has 6,552 km of rail track in operation --- the longest amount of high-speed rail track in the world.

At present, at least 10,000 km of high-speed rail line is under construction in China. About 3,676 km of new track for running trains at speeds up to 350 kph have already been laid and put into operation. Another 2,876 km of old tracks have been upgraded to run trains of 200 to 250 kph. .

Ultimately, China plans to construct a 120,000-km railway network, including 50,000-km of high-speed rail track, by 2020.

The Ministry of Railways wants to export China's high-speed railway technology to North America, Europe and Latin America.

Wang said, “State-owned Chinese companies are already building high-speed lines in Turkey and Venezuela. Many countries, including the United States, Russia, Brazil and Saudi Arabia, have also expressed interest.”

56.When will the Beijing-Shanghai high-speed railway come into use?

A. In 2012.                   B. In 2013.                   C. In 2011.           D. In 2010

57. How much time will a passenger save by train from Beijing to Shanghai after the high-speed railway is open? 

A. 4 hours.                          B. 6 hours.                   C. 10 hours.          D. 3 hours.

58. Which of the following countries owns the longest railway in the world ?

A. China.                            B. America.                 C. Canada.            D. Russia.

59. Which city, in the opinion of vice-minister Wang Zhiguo, can passengers from Beijing reach  in high-speed trains within 8 hours ?

A. Haikou.                          B. Urumqi.                   C. Lhasa .             D. Changsha.

60. What can we learn from the last two paragraphs?

A. The Ministry of Railways wants to increase GDP by exporting railway technology.

B. China’s railway technology is superior to that of many other countries.

C. Countries in North America have already imported the railway technology of China.

D. The United States also wants to build high-speed railways in Turkey and Venezuela.

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我国A公司与一国B公司于2000年2月20日签订了购买5万吨大米的CIF合同。A公司开出信用证规定,装船期限为2000年6月5日至6月15日,由于B公司租用的甲船在开往指定港口时由于战争封锁而迟至6月20日才到达装货港,货物于6月22日装好后启运。承运人在取得B公司开出的保函后签发了与信用证规定一致的提单。

B公司为这批大米投保了淡水雨淋险。2000年6月28日,甲船在途中遭遇飓风,大米部分被浸,在翻晒过程中,大米又被雨淋了。由于船舶的迟延到达,致使目的地大米价格下降,A公司为尽快处理大米而大幅降价,承受了很大的损失。

船舶在途中遭遇了什么风险,应由谁来承担()

A.共同海损A公司承担

B.单独海损承运人承担

C.共同海损B公司承担

D.共同海损承运人承担

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