成人英语三级

单选题The expression "this two-dimensional approach" in the second paragraph refers to__________．

A．the conventional computer and the neural computer
B．making decisions and recognizing patterns
C．sharing information and performing tasks
D．the computer and the human brain

参考答案：C进入在线模考
语义词义题。从这个短语前面的这句话they can share information and perform tasks at the same time可知答案为C。

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1 Scientists use software rather than hardware in their experiments because__________．

A．it can avoid redesigning computer chips
B．it can save a lot of time and money
C．it can avoid making mistakes
D．it is more like the human brain

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2根据下面资料，回答题
Broadband technology is seen as the key to the new digital economy． In this rapidly changing world, media and technology information can be sent via phone calls and downloads like music, graphics, business information or films． The simpler the information, the smaller the package and the narrower the bandwidth needed to deliver it．
Broadband is used for high speed Internet connections at a fixed monthly rate． It turns an existing telephone line into a high speed digital line capable of carrying data up to 40 times conventional modem speeds． Any download is available at the click of a mouse—there is no dial-up as there is with standard Internet Service Providers． For home owners and fam-ilies there are many advantages． One of the most important is simultaneous (同时的) access to both telephone lines and the Internet． No queues and no delay． For businesses,broadband can improve customer relations and provide direct access to corporate e-mails and databases．
Entire operations can go online．
The function that broadband technology has on the new digital economy is__________．

A．further
B．critical
C．costly
D．global

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3How much does a user pay if he has broadband technology installed?

A．It depends on the length of time．
B．It depends on the times of dial-up．
C．He pays at a fixed monthly rate．
D．He pays a lot of money．

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