问题 多项选择题

有关头颅正位摄片的叙述,错误的是()

A.病人呈俯卧姿势

B.听眦线垂直台面

C.矢状面平行台面

D.下颌内收,靠近台面

E.两外耳孔到台距等高

答案

参考答案:C, D

解析:头颅正位摄影,主要了解颅骨的对称性、颅骨骨质、骨板厚度、颅内钙化和指纹压迹等情况。要求病人俯卧于摄影台上。双臂内旋置于身体两侧。下颌内收,额及鼻尖靠紧台面,头正中矢状面垂直台面中心并重合。听眦线垂直台面,两外耳孔到台面距离相等。胶片长轴与台面中线平行,上缘超出头顶约3cm。

填空题
阅读理解

阅读理解 

     Have you ever seen people dance? Some dances are fast and others are slow. People's feet always

move when they dance. They keep on moving until the music stops.

     People have enjoyed dancing for a very long time.This story is of a different kind of dance. It is a

dance without people or music. Yet this dance is one of the oldest in the world. It is the dance of bees.

     If you have ever watched bees, you know that they are very clever. They also work hard looking for

food and bringing it back to their home.

     The home of the bees is called a beehive. Here hundreds even thousands of bees live. They work day

and night building small walls of wax. There they make their honey. This is the same honey that we eat.

     Where does the honey come from? Bees live on food from flowers. Have you seen bees flying around a flower garden? When a bee rests on a flower, it tries to go to the centre of it. There it takes in as much

food as its body can hold. Then it flies to take the food back to the hive.

     At the hive, bees change this flower food into honey. Then they fly away for more food.

     How do the bees know where to find the best food in the sweetest flowers? One bee acts as a guide.When it discovers good flowers, it flies back to the hive and tells the others. It does this by dancing for

them. The bee dances on one side. This tells the otherbees which way to go to find the flowers. But that is

not all. The bee dances for some time. And the length of its dance tells the other bees how far they must

fly to reach the flowers. When the bees see the dance, they know where the flowers are.

     They fly away and return with more food for the hive.

     Sometimes we hear the music of the bees as they fly around, but few people have ever seen them

dance. Yet without that dance we might never have sweet honey to eat.

1. The writer believes that       .

A. people dance better than bees

B. people learned dance from bees

C. bees dance more often than people

D. bees don't like music

2. From this passage we know that the dance of bees means      .

A. they are good at dance

B. they want to show their beauty

C. they communicate with each other

D. they have nothing to do

3. Which of the following is TRUE?

A. People get honey from flowers directly.

B. People draw honey from bees' bodies.

C. People produce honey in a secret place.

D. People get honey from bees indirectly.

4. What character do bees have?

A. Dance loving.

B. Hardworking.

C. Music loving.

D. Active.

5. If a bee wants to get some information about the distance of food, he may watch closely at       of the

other bees' dance.

A. the side

B. the length

C. the place

D. the time