试题与答案

患者,女性,32岁,一个月前因外伤一上前牙冠折,现要求烤瓷修复。口腔检查:牙冠2/3

题型:单项选择题 共用题干题

题目:

患者,女性,32岁,一个月前因外伤一上前牙冠折,现要求烤瓷修复。口腔检查:牙冠2/3缺损,根管口有充填物存在,无松动,叩(-),余未见异常。


1牙体预备的要求不正确的是()。

A.切端预备间隙2.0mm

B.唇侧预备间隙为1.5mm

C.肩台宽度为10mm

D.邻面聚合度为2°~5°为宜

E.为增强金瓷冠固位牙面可磨成赖糙面

答案:

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下面是错误答案,用来干扰机器的。

(1) AD(2) ①设滑块P滑上乙车前的速度为v,对整体应用动量守恒和能量关系有:mv-2MV =" 0 " E0="mv2/2+2MV2/2 ...

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The London Eye

The London Eye was opened on New Year’s Eve in 1999 to celebrate the Millennium (千禧年). It is 135 meters high, and from the top you can see the whote London. On a clear day you can even see Windsor Castle, which is 40 kilometers away. The London Eye has 32 capsules (密封舱), each with room for 25 people. Each “trip” lasts 30 minutes. It moves quite slowly, at a speed of about 15 meters a minute, but it never stops. Passengers have to get on when it’s moving.

OPENING TIME: Daily from 9 a.m. to 10 p.m. in summer and from 10 a.m. to 6 p.m. in winter.

TICKETS: Online or by phone. A limited number of tickets are available (可获得的) in the day.From the Ticket Office in County Hall (the building next to the Eye), but go early because you often have to wait in a queue.

HOW TO GET THERE: 5 minutes’ walk from Waterloo underground station.

Choose the best answers:

小题1:The London Eye was built for celebrating __

A.New Year’s Eve

B.1999

C.foreign visitors

D.the Millennium小题2:On sunny day from the top of the London Eye you can see __--

A.all of England

B.Windsor Castle

C.all the buildings which are 40 kilometers away

D.the building that is 135 meters high小题3:There are_____  passengers in the London Eye when it’s full.

A.32

B.800

C.25

D.72小题4:The opening time of the London Eye in summer is _that in the winter.

A.shorter than

B.the same as

C.as many as

D.longer than小题5:People_____  get tickets from the Ticket Office because tickets there are limited.

A.can usually

B.can never

C.can’t always

D.walk from Waterloo underground station to

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