天然辐射源包括() A.宇宙射线(初级射线与次级射线引起的外照射) B.核技术应用

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问题:

天然辐射源包括()

A.宇宙射线(初级射线与次级射线引起的外照射)

B.核技术应用

C.核事故

D.电离辐射在医学诊断和治疗中的应用

E.天然放射性核素(内照射与外照射)

考点:放射卫生(医学高级)医学高级放射卫生(正高)押题密卷二
题型:多项选择题

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       Can you remember the day when you spoke your first words? It you can, you are unusual. Try to

think what the first few months of your life were like. I'm sure you just spent most of your time eating,

sleeping and crying. As you grew older, you were awake more of the time. It look your parents more to

play with you and talk to you .You watched and listened. You began to know that people make some

sounds to go with some things.

       Then you began to cry to make sounds you heard. And step by slop you were able to make sounds

you heard .And step by step you were able to make the right sound for one thing.

       On that day you came to understand the secret of the language. The secret is that a certain sound

means a certain thing. One sound might be as good as another. But it is not as good as a word unless

everyone agrees on its meaning. Only when a group of people use the same set of sounds of things. they

can understand each other, so these people have a language.

       After you found the secret of language, you learned words.  Some of the words meant thing, such

as books, chair and shops.  Some of the words meant actions such as go and swim. And other words

describe things such as good or dirty. Soon you learn to put words together to express one's idea, such

as "I want to go out and play with my friends." This is language. By the way of language people can

communicate. So we say languages mean communication.

1.             can remember the day when we spoke our first words.                  

A. Few of us

B. No one

C. Most people

D. Someone

2. When you were a little baby. You             

A. made sounds to let people know that you wanted to eat

B. spent most of your time eating, playing and sleeping

C. could not hear any sounds around you

D. spent most of your time playing with your parents

3. The secret of language is that             .

A. one sound might be as good as another

B. a certain sound is for a certain thing

C. people can understand each other

D. there is a special sound for each other

4. You could learn words              .

A. before you knew what language was

B. when you were a baby

C. if you knew what language was

D. after you knew what language was

5. The use of language is               .

A. to get everything one wants from another

B. to say what one wants to know

C. to make oneself understood by others

D. to share ideas, opinions, news, etc. with one another

题型:多项选择题

下列各组单体间能发生逐步加聚反应的是()

A、对苯二甲酸和乙二醇

B、2,4-甲苯二异氰酸酯+乙二醇

C、苯酐和氨基酸

D、苯酚和甘油

题型:多项选择题

唐朝时期,陶瓷业发达,被称为世界工艺珍品的是()

A.邢州的白瓷

B.越州的青瓷

C.冰裂纹瓷器

D.唐三彩

题型:多项选择题

IP承载网中,CE和核心网网元之间的静态BFD无法UP,可能存在以下哪些原因()

A.CE侧配置BFD没有做commit操作

B.核心网网元没有配置BFD

C.CE和核心网网元之间链路故障

D.CE和核心网网元之间配置的BFD检测时间不一致

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球拍覆盖物应覆盖整个拍面,可超过其边缘。()

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