问题 单项选择题 案例分析题

男,45岁。在某诊所作左下后牙固定修复体3年,近来义齿松动,口臭,左下后牙自发性疼痛,夜间明显。查:缺失,为桥基牙,金属全冠固位体颈缘下方可探及龋,未见破损。

口腔检查的重点是()

A.口腔卫生状况

B.牙周组织状况

C.牙槽嵴

D.关系

E.原修复体及基牙

答案

参考答案:E

单项选择题
阅读理解

What do you use to get around town? A car? A bike? Your feet ? perhaps you should try a segway!

The Segway is perfect for short journeys. It’s an electric vehicle that consists of a platform between two wheels, with a pole that connects the platform to the handlebars. To ride it , you step up onto the platform, and control the Segway by moving your body. Lean forwards to go faster, and back-wards to slow down.

On older models, direction was controlled by a twist grip(扭转把手)on the left handlebar. This varies the speeds between the two motors, and a decrease in the speed of the left wheel would turn the Segway to the left . With newer models you simply lean to the left or right. Meanwhile, a gyroscope (陀螺仪)detects your movements and prevents the machine from falling over. The Segway has a maximum speed of 19 km per hour and a range of about 38 km. after that, you need to plug it and recharge the battery.

Segways are used for a variety of purposes. People with mobility problems can now enjoy walks in the country with their friends and family. Some golfers see them as an alternative to the golf cart . And dog owners now have an easier way to take the dog to the park. A few police forces use Segways, too. They allow officers to move quickly while maintaining contact with the public. They’re also becoming a common sight on airport . However, the most popular use is in tourism , particularly for city tours . Visit any major tourist city in summer, sit outside a cafe for a while and there’s a good chance you’ll see a group of tourists passing on Segways.

小题1:How do you turn to the left on a Segway of the new model?

A.Lean to the left

B.Adjust the twist grip

C.Press the left bar

D.Control the gyroscope小题2:How far can you travel on a Segway at most?

A.Less than 19 km

B.About 19 km

C.About 38 km

D.Over 45 km小题3:The Segway is most commonly used by       .

A.families

B.golfers

C.police

D.tourists小题4:Which of the following correctly shows the order in which information about the Segway is provided?

A.Introduction→Ways of application→ structure→Principle of operation

B.Introduction→ Principle of operation→Structure →Ways of application

C.Introduction → Structure → Principle of operation →ways of application

D.Structure→ Introduction→Principle of operation→Ways of application小题5:Which of the following pictures shows the Segways being used?