患者女，25岁。近半年双手关节肿痛，查体见甲周红斑，双下肢紫癜，实验室检查示血小板减

一中年男性，胃病史8年余，近3个月腹痛加剧。胃镜检查示胃角溃疡，幽门螺杆菌检查阳性。该病人最具诊断价值的病史是( )

A．上腹痛无规律

B．饥饿痛为主，进食后缓解

C．午夜痛为主

D．发作性剧痛

E．餐后0.5～1小时腹痛

空气污染指数的英文缩写是_________，污染指数为30的空气质量级别为___________。目前计入空气污染指数的项目暂定为氮氧化合物、__________、__________。

Many people know the names Alexander Graham Bell and Thomas Edison. However, most people don’t know the name of the man who invented the television, Philo Farnsworth.

Philo Farnsworth was born in 1906 and grew up on a potato farm. As a boy, he loved to learn about science, and he read a lot of science books. When he was only thirteen years old, he drew a picture of a machine that could send pictures as radio sends sounds. He got the idea from the way the potatoes were planted in the field. The potatoes grew in long lines, side by side. This made a shape in Philo’s mind. This shape helped Philo think of a way to send the TV picture onto a piece of glass. But he was poor, so Philo could not try to make his idea into a machine at that time.

Later, Philo worked at many different jobs. He worked with trees. He worked on broken radios. He worked on trains. He also worked as a street cleaner. At last, two rich men heard about his idea for television, and they gave him the money to make it. On September 7th, 1927, they watched Philo test the machine he built. When Philo turned on the machine, a small line could be seen on the glass. Philo said, “There you have it, electric television.”

Later, a big company, RCA, said they had made the first television. Philo had to spend a lot of money on lawyers to fight them. Finally, he won. Then, World War Two started in 1939. During the war, Philo spent a lot of money helping the US army instead of building up his television company. After the war, other bigger, richer companies started making televisions. In the end, Philo had to sell his company.

小题1:Why does the author mention Bell and Edison at the beginning of the text?

A．To remember both of them.

B．To prove their wisdom.

C．To introduce the topic of the text.

D．To explain their relationships.小题2:According to the text, how old was Philo when he finished his invention of TV?

A．27 years old.

B．21 years old.

C．33 years old

D．39 years old小题3:Philo Farnsworth got the idea for TV from ______.

A．the radio

B．science books

C．potato fields

D．a machine小题4: The underlined part “building up” in the last paragraph probably means “______”.

A．starting

B．selling

C．putting up

D．making bigger小题5:Which is the correct order of the following events?

a. Two rich men gave Philo money to do experiments.

b. Philo sold his own company.

c. Philo beat RCA in law.

d. Philo fixed broken radios.

e. Philo showed his invention to others.

A．d, a, e, c, b

B．e, d, c, b, a

C．d, c, e, b, a

D．a, c, b, d, e

在室外变电所或变压器的构架上应悬挂（）的标志。

A.禁止启动

B.禁止通行

C.禁止攀登

D.禁止入内

WT-300型钻井绞车离合器片磨损超过（）时，应该更换。

A.1.5mm

B.2.5mm

C.2mm

D.3mm