大學(xué)英語(yǔ)四級(jí)新題型模擬訓(xùn)練及參考答案

三、選詞填空

>>> 參考答案
    The biggest safety threat facing airlines today may not be a terrorist with a gun, but the man with the 1 computer in business class. In the last 15 years, pilots have reported well over 100 2 that could have been caused by electromagnetic interference. The source of this interference 3 unconfirmed, but increasingly, experts are pointing the blame at portable electronic device such as portable computers, radio and cassette players and mobile telephones.

RTCA, an organization which advises the aviation（航空）industry, has recommended that all airlines ban（禁止）such devices from being used during “ 4 ” stages of flight, 5 take-off and landing. Some experts have gone further, calling for a total ban during all flights. Currently, rules on using these devices are left up to individual airlines. And although some airlines prohibit passengers from using such equipment during take-off and landing, most are 6 to enforce a total ban, given that many passengers want to work during flights.

The difficulty is 7 how electromagnetic fields might affect an aircraft’s computers. Experts know that portable device emit radiation which 8 those wavelengths which aircraft use for navigation and communication. But, because they have not been able to reproduce these effects in a laboratory, they have no way of knowing whether the interference might be dangerous or not.

The fact that aircraft may be vulnerable（易受損的）to interference raises the risk that terrorists may use radio systems in order to damage navigation 9 . As worrying, though, is the passenger who can’t hear the instructions to turn off his radio because the music’s too 10 .

A)definite

B)incidents

C)effects

D)remains

E)critical

F)particularly

G)reluctant

H)refreshing

I)portable

J)enormous

K)predicting

L)liberal

M)affects

N)equipment

O)loud

四、改錯(cuò)

>>> 參考答案

Most people work to earn a living and they

produce goods and services. Goods are either

agricultural (like maize) or manufactured (like

cars). Services are such things like education, 1._________

medicine, and commerce. These people provide 2.__________

goods; some provide services. Other people provide

both goods or services. For example, in the same 3.__________

garage a man may buy a car or some service which

helps him maintain his car.

The work people do is called as economic 4.__________

activity. All economic activities taken together make

up the economic system of a town, a city, a country,

or the world. Such economic system is the sum-total 5.__________

of what people do and what they want. The work

people do either provides what they need or provides

the money with that they can buy essential 6.__________

commodities. Of course, most people hope to have

enough money to buy commodities and services which

are essential but which provide some particular 7. __________

personal satisfaction, such as toys for children, visits 8. __________

the cinema, and books.

The science of economics is basic upon the facts 9. __________

of our everyday lives. Economists study our everyday

lives and the general life of our communities in order

to understand the whole economic system of which we

are a part. They try to describe the facts of the

economy in which we live, and to explain how it

works. The economist methods should of course be 10. __________

strictly objective and scientific.