二级医院病床数不少于多少张A．100 B．150 C．350 D．400 E．700

关于CT值的描述，哪项是错误的（）

A.CT值说明组织结构的密度高低

B.CT值没有单位

C.CT值具有量的概念

D.CT值由吸收系数换算而来

E.对比平扫和增强扫描的CT值，可了解强化程度

患者，男性，72岁，反复咳嗽、咳痰34余年，进行性呼吸困难5余年，反复双下肢水肿1年。因咳嗽、咳痰加重伴呼吸困难2天入院。查体：慢性病容，口唇发绀，颈静脉怒张，球结膜充血水肿，桶状胸，双肺叩诊呈过清音，呼吸32次／分，双下肺可闻及细湿啰音，双下肢呈可凹性水肿。X线胸片示：两肺纹理增重、紊乱，两肺透亮度增高。

下述检查结果提示该患者为阻塞性通气功能障碍的是（）

A.FVC占预计值50%

B.TLC占预计值60%

C.FEV₁占预计值60%

D.FEV₁／FVC<60%

E.V₅₀占预计值的70%

ydlj

                                                      Have you ever wondered?

1.Why do airplanes take longer to fly west than east?, It can take five hours to go westeast from New

York (NY) to London but seven hours to travel eastwest from London to NY.The reason for the

difference is an atmospheric phenomenon known as the jet(喷射) stream.The jet stream is a very high

altitude wind which always blows from the west to the east across the Atlantic.The planes moving at a

constant air speed thus go faster in the westeast direction when they are moving with the wind than in the

opposite direction.

2.What would happen if the gravity on Earth was suddenly turned off?, Supposing we could magically

turn off gravity.Would buildings and other structures (建筑物) float away? What happened would

depend on how strongly the things were attached to the Earth.The Earth is moving at quite a speed,

moving at over a thousand miles per hour.If you turn something around your head on a string(细绳), it

goes around in a circle until you let go of the string.Then it flies off in a straight line.'Switching off' gravity

would be like letting go of the string.Things not attached to the Earth would fly off in a straight line.People

in buildings would suddenly shoot upwards at a great speed until they hit the ceiling.Most things outside

would fly off into space.

1. What information can we get from the first passage?

A. It is the jet stream that affects how fast airplanes fly.

B. Planes go slower when they are moving with the wind.

C. It takes more time to fly from NY to London than from London to NY.

D. The jet stream always blows from the east to the west across the Atlantic.

2. The word"shoot"underlined in the 2nd passage probably means"________".

A. send for            

B. move quickly

C. come out          

D. grow quickly

3. It can be inferred that without gravity________.

A. buildings and other structures would float away

B. trees and buildings would not so easily fly off

C. something around your head would not float away

D. everything outside buildings would fly off into space

4. Where can we most probably read this text?

A. In a research paper.

B. In a short story.

C. In a travel magazine.

D. In a student's book.

ZSTX表示（）。

A.直立型喷头

B.下垂型喷头

C.干式喷头

D.嵌入式喷头

下列哪些可以用来核查输出结果和控制总数？通过匹配输入数据和控制总数（）。

A.批标题表单

B.批量平衡

C.数据转换错误更正

D.对于打印缓存的访问控制