简述中龋诊断要点。

Dragons can be friendly or fierce (凶狠), they can bring good luck or cause death, but one  thing is sure——people  talk about  them almost everywhere in the world.

In Chinese culture, dragons are generous and wise, although  they can be unpredictable. The dragon was closely connected  to  the royal  family: the emperor's robes (礼袍) have a symbol of a gold dragon with five claws. According  to popular belief,  if you were born  in  the year of the dragon, you are intelligent, brave, and a natural leader.

But in the west, dragons had a different reputation (名声). The very first text in English, the Anglo-Saxon poem Beowulf, tells the story of a Scandinavian hero, Beowulf, who fights and kills a dangerous dragon but is himself killed in the fight. However, across the border in Wales, the red dragon which appears on the Welsh flag is a positive symbol, indicating strength and a sense of national identity.

Why should  the dragon have a different character  in different parts of  the world? Some experts believe it is due to the animals that the myths grew out of.  In the west, the  idea of  the dragon probably came  from  the snake—an animal which people hated and were afraid of.

But in China, the idea of the dragon may have come from  the alligator--a shy animal which lives in rivers, but which  is usually only seen when  there  is plenty of water--a good sign for agriculture(农业). So the Chinese dragon was a bringer of good fortune.

小题1:将划线句子翻译成中文。

_____________________________________________________________

小题2: 阅读填词，每空一词。

In China, people think the dragon may have come from the ____ which is a shy animal. However, in the west, they think the dragon may come from the _____ that they hated and scared.

小题3:What  are  the  differences  between Chinese dragons and western dragons? (从文中找

出相关描述的英语单词或短语，每空至少一个。)

Chinese dragons：_____________        Western dragons：___________.

若某光纤纤芯中心与包层表面中心之间距离为d，芯半径为r，包层半径R，则其同心度误差为（）。

A.R-r

B.（R-r）/d

C.d/2r

D.d/2R

储蓄是经济增长的资源基础，但最大限度的储蓄增长率决不是最优的经济增长率，只有适度的储蓄增长率才容易带来较大的经济增长率。 对这段话理解正确的一项是( )。

A．储蓄增长率应与经济增长率相等

B．储蓄增长率与最优的经济增长率成反比

C．储蓄增长速度如果无限度地增长，会影响经济增长速度

D．最大限度的储蓄增长率要求最优的经济增长率与之相适应

患者男性，70岁。双上肢震颤3年，行走困难1年就诊。既往有前列腺增生病史5年。查体：神清语利，高级智能正常，口唇及双上肢有静止性震颤，四肢肌张力高，四肢腱反射正常存在，四肢病理征阴性。行走呈慌张步态。

提问：帕金森病有以下哪些特征（）

A.意向性震颤

B.眼角膜K-F环

C.Myerson征

D.眼睑阵挛

E.眼睑痉挛

F.写字过小征

G.写字过大征

开放性骨折一般不做清创缝合的时限为伤后（）。

A.3～6小时

B.6～8小时

C.8～12小时

D.12～24小时

E.超过24小时