根据《电力辐射防护和辐射源安全基本标准》,公众人员任何单年有效剂量不应超过() A.

题型:单项选择题

问题:

根据《电力辐射防护和辐射源安全基本标准》,公众人员任何单年有效剂量不应超过()

A.1mSv

B.5mSv

C.15mSv

D.50mSv

E.100mSv

考点:医技考试核医学技术相关专业知识核医学技术相关专业知识
题型:单项选择题

奶牛,6岁,努责时阴门流出红褐色难闻的黏稠液体,其中偶有小骨片。主诉,配种后已确诊怀孕,但已过预产期半月。如要进一步确诊,最简单直接的检查方法应是()

A. * * 检查

B.直肠检查

C.细菌学检查

D.心电图检查

E.血常规检查

题型:单项选择题

阅读短文,选择正确答案。

     Have you ever seen snow? Many people in the world have not. Some countries never have snow; some have

only a little on the tops of very high mountains. In the north of England, there is quite a lot of snow every winter,

but in the south of England, there is usually little.

     When a student from a warm country comes to England in autumn for the first time, he feels cold at first.

There are often dark clouds, grey sky and cold rain in England in autumn, and most students from warm

countries do not like this.

     But snow is different. Though it is cold, it is also beautiful. Perhaps, after several dark mornings, the student

wakes up one day, and there is a lot of light in his room. He thinks"Is it so late?" and jumps out of bed. But no, it

is not very late. He looks out of the window and there is the snow on the ground and on the houses and

everywhere. The light of his room comes from clean, beautiful snow.

1. In which part of England is there much snow in winter? [ ]

A. In the east.

B. In the north.

C. In the west.

D. In the south.

2. In the autumn of England, we can NOT often see ________. [ ]

A. grey sky

B. dark clouds

C. strong winds

D. cold rain

3. Why does the student ask himself "Is it so late?" [ ]

A. Because he has some work to do.

B. Because it is bright in the room.

C. Because it is really late.

D. Because he usually gets up early.

4. Which of the following statements is true? [ ]

A. Every country in the world has snow in winter.

B. Foreign students like the weather in England.

C. It is often very warm in the autumn of England.

D. Many people in the world haven't seen snow.

题型:单项选择题

门静脉高压症

题型:单项选择题

()全面系统地论述了交易费用,分析了交易费用产生和增大的原因,也说明了企业存在的根源。

A.奈特

B.科斯

C.克拉克

D.威廉姆森

题型:单项选择题

脱氧合金元素与氧的亲和力均比铁与氧的亲和力要强,因此所有的合金元素对钢水均有不同程度的脱氧作用。()

更多题库