对减少回弹的措施表述有误的一项是（）。A、提高材料塑性 B、提高变形程度和校正力 C、采

食管癌的典型症状为

A．咽下不适

B．食管内异物感

C．咽部不适

D．进行性吞咽困难

E．胸骨后烧灼样痛

Petroleumis a very important mineral. It gives us heat and light. It gives us power for our cars, planes, and ships. Also, it gives us power for machines of all kinds.

How is petroleum formed? Scientists believe petroleum comes from the remains of plants and animals (Remains are what is left after a plant or animal has died.)

What exactly is petroleum? Petroleum is a mineral that is a mixture of hydrocarbons. It is an oily liquid, which may be brown, green, or black in colors. The word “petroleum” comes from Greek. It means “rock oil”.

Crude (天然的, 未加工的) oil is petroleum that comes directly from deep in the ground. It is then taken to a refinery. a refinery is a kind of factory to refine oil. At a refinery the crude oil is separated into many parts. From the refined petroleum we get important things, such as gasoline, kerosene, fertilizer, detergents and a lot of other useful things. In fact, there are thousands of such things that we can get. Petroleum really is of great value!

小题1:Which of the following is Not true?

A．“ Petroleum” is a German word.

B．“Petroleum” suggests “ coming from rocks”.

C．“ Petroleum” isn’t an English word in the original.

D．“Petroleum” is of Greek origin.小题2:Which of the following is true?

A．We can kill animals and plants, and get petroleum by burning them us.

B．Over a very long period of time, under certain conditions, dead trees and bodies of animals were turned into petroleum under great pressure.

C．Petroleum is a kind of metal mineral like copper（铜）or iron.

D．Petroleum has three states.小题3:The word “refine” in the 4^th paragraph can be replaced by “______”.

A．get unmixed with other substances

B．divide into separate parts

C．get mixed with other substances

D．choose the best substance小题4: Which of the following might be the best title for the passage?

A．An Important Source of Energy.

B．Petroleum and Its Uses.

C．Where Does Petroleum Come From?

D．A Special Rock Oil.小题5:This passage is most likely taken from _____.

A．a fairy tale

B．a novel

C．a popular science magazine

D．a scientist’s diary

2009年12月1日，某企业研制并开发某种新产品，研究过程中发生各项费用共计85000元，其中耗用材料45000元，支付研制人员工资20000元，其他费用20000元。开发过程中发生各项费用共计185000元(符合资本化条件)，其中耗用材料85000元，支付研制人员工资20000元，其他费用80000元。该种新产品研制成功，经申请取得A专利权，申请专利权的过程发生专利登记费用30000元，律师费5000元。那么A专利权的入账价值为( )元。

A．220000
B．12000
C．115000
D．85000

本地交换机与用户之间的连接部分属于（）部分。

A.用户网

B.接入网

C.交换网

D.传送网