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问题 单项选择题

下肢静脉的静脉瓣功能不全，观察有无返流及其速度快慢时，应首选下述哪种技术？( )

A．M型

B．B超

C．能量图

D．彩色多普勒血流显像

E．三维超声

答案

参考答案：D

单项选择题 案例分析题

某患者，男，42岁，缺失，原塑料可摘局部义齿纵折，要求重新修复。义齿设计：铸造金属合面，舌侧铸卡颊侧弯制卡环，为隙卡。

下述义齿装盒操作中正确的是（）

A.、颊侧卡环与模型包埋固定在下半层型盒内

B.装下半层型盒时，、颊侧卡环和蜡型一起暴露，只包埋固定模型

C.装下半层型盒时，铸造金属面和蜡型用石膏包埋

D.颊侧卡环不与模型一起包埋固定在下半层型盒内

E.应采用正装法装盒
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填空题


Health officials in western Siberia are to begin in slaughter of thousands of birds today after identifying Russia’s first outbreak of a bird flu strain that can be fatal in humans. Doctors in neighboring Kazakhstan have also (1) that a 19-year-old poultry worker (2) admitted to hospital with (3) of bird flu, only to be diagnosed (4) double pneumonia.
The H5N1 strain of avian (5) has killed 60 people (6) 2fib in Vietnam, Thailand, Cambodia and Indonesia, but has rarely been found in birds or humans (7) Asia.
Health officials (8) that HSN1 is infecting migrating birds, which could spread the (9) into Europe. Earlier this year China registered the first outbreak of H5N1 (10) wild birds, some of which (11) to breeding grounds in Siberia. These birds could come (12) contact with others flying to Europe and North America.
Russia’s (13) began in the Novosibirsk (14) , about 1,750 miles (15) of Moscow in the Asian part of Russia, early last month, but the veterinary service (16) the virus only last week. Valery Mikheyev, the chief sanitary doctor of Novosibirsk, said that teams had been (17) the (18) birds and supervising the slaughter in13 (19) villages. He said, "The state of (20) of the inhabitants of these areas gives (21) cause for alarm. Up to 6,000 people are being (22) per day.
The virus seems to have (23) only private farms that let (24) mix with wild birds. Further outbreaks were registered in the Omsk and Altai regions, but the strain had (25) to be determined, Russia’s Emergency Situations Ministry said.
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