患者,女,40岁,A5678B45678缺失,余留天然牙稳固,牙槽骨丰满,A4

题型:单项选择题

问题:

患者,女,40岁,A5678B45678缺失,余留天然牙稳固,牙槽骨丰满,A4B3做基牙,铸造支架修复。

由于合金成分不同,各种合金熔化铸造时机也不同,钴铬合金的最佳时机是

A.金熔化呈球状,表面氧化层未破时

B.金熔化呈球状,表面氧化层刚冲破的瞬间

C.合金熔化呈沸腾状时

D.合金熔化呈静面时

E.合金部分熔化塌陷时合金熔化呈沸腾状约20s

考点:口腔医学技术(主管技师)口腔技师专业实践能力中级口腔医学主管技师专业实践能力7
题型:单项选择题

设备采用无垫铁安装施工时,应符合下列要求()。

A、应根据设备的重量和底座结构确定临时垫铁、小型千斤顶或调整顶丝的位置和数量

B、当设备底座上设有安装用的调整顶丝时,支撑顶丝用的钢垫板放置后,其顶面水平度允许偏差为1/1000

C、采用无收缩混凝土灌注应随即捣实灌浆层,待灌浆层强度达到设计强度的75%时,方可松掉顶丝或取出临时支件,并应复测设备水平度,合格后,将支撑件的空隙用砂浆填实

D、灌浆用的无收缩混凝土的配比应符合规范规

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简述内外环境之间的关系?

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关于招聘录用决策的说法,正确的是()。

A.正确决策与总的决策之比是衡量决策正确性的指标

B.如果人事部门与用人部门在录用人选上产生分歧,应当录用人事部门确定的人选

C.招聘经理们一般更关心错误拒绝的决策在总决策中所占的比例

D.录用决策通常应在综合分析测评数据资料的基础上作出

E.录用决策一旦作出,应该马上通知被录用者

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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.

题型:单项选择题

急性心梗并发心源性休克的主要原因是:()

A.血管床增大而有效循环血量不足

B.窦性心动过速

C.心排血量急剧降低

D.周围血管扩张

E.迷走神经兴奋性增加

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