患者，男，56岁。精神不振，体倦乏力，面色萎黄，畏寒肢冷，腰膝酸软，阳痿，舌淡脉沉细

The scientists from the Lockheed Space Company (公司) work in Felton, California, with the help of a computer. But the computer is placed in Sunnyside, about 80 kilometers away. What the scientists input is sent by telephone lines to the computer, and after a time, copies of the designs are needed back in Felton as possible. Lockheed people have tried several ways of sending the prints (印刷品), but the most effective seems to be by pigeon (鸽子). Are pigeons really used to carry messages in these days? They are, and they send the prints faster and cheaper than any other way.

Human (人类的) messengers (persons carrying messages) are much more expensive and slower than the pigeons. The road to Felton goes through the mountains, and the driving is not easy. An electronic printout system(电子印刷系统) could do the work in Felton, but at a cost of 10 dollars a print. Pigeons carry the designs for about 1 dollar each.

Now Lockheed people have ten pigeon messengers. The pigeons do the work, and they have made Lockheed more famous. You can often read the news about the pigeons in the newspapers around the world.

小题1:The story is mainly about      .

A．Felton, California

B．the scientists

C．how to work with computers

D．sending prints by pigeon小题2:This story is unusual because pigeons       .

A．don’t like carrying things

B．are often cheap to keep

C．seem out of place in the space age

D．aren’t friendly to the scientists小题3:Something that’s effective（有效的）       .

A．usually costs more

B．is something that works

C．is often unhappy

D．is often don by animals小题4:Which happened first?

A．Pigeons were used as messengers.

B．Human messengers were used.

C．What the scientists input was sent to the computer.

D．Scientists got their designs.小题5:Lockheed likes the pigeons because they       .

A．do the work at low cost

B．get their pictures on television

C．understand the computer

D．make the scientists pleased

颈椎屈伸活动主要发生在（）

A.环枢椎之间

B.枢椎与第3颈椎间

C.第3～7颈椎

D.上颈段椎体

E.下颈段椎体

患儿3个月，诊断为佝偻病活动期，可出现下列哪项体征（）

A.鸡胸

B.方颅

C.颅骨软化

D.漏斗胸

E.手镯、脚镯

下列预防措施中属于被动免疫的是( )

A．口服脊髓灰质炎糖丸

B．注射卡介苗

C．注射丙种球蛋白

D．注射麻疹疫苗

根据有毒有害物质放散起因，环境风险类型分为( )三种类型。

A．一级、二级、三级
B．重大危险源、中等危险源、一般危险源
C．有毒、易燃、爆炸
D．火灾、爆炸和泄漏