控制器的功能是______。A．指挥、协调计算机各部件工作B．进行算术运算和逻辑运算C．存储数据和程序D．

I am not sure whether I can get any profit from the business, so I can't make a(n)______ decision abut what to do next.

A．exact

B．denied

C．sure

D．definite

It can be inferred from the passage that

A．computer networking will be helpful in the food industry.

B．24-hour supermarkets are not very common.

C．few shopping centers are three-shift open at any hour.

D．24-hour restaurants are not in practice in the great business capitals.

A、The global presence of e-commerce reduces competition.

B、E-commerce sites are open 24/7. That means, they are always open, 24 hours a day, 7 days a week.

C、People can order goods from anywhere at any time. That is, there are no barriers of geography, or place; no barriers of time.

D、People can save a lot of money through buying online.

We can infer from the passage that ______.

A．computer networking will be helpful in the food industry

B．24-hour supermarkets are not very common

C．Few shopping centers are three-shift open at any hour

D．24-hour restaurants are not in practice in the great business capitals

Ss on business, he can ____ himself to sleeping in any place he can find.

A、make

B、accustom

C、force

D、let

A．There may exist some intelligent life.

B．There isn't any intelligent life.

C．There may exist some living things.

D．There may even be no living things.

We can infer from the passage that______.

A．computer networking will be helpful in the food industry

B．24-hour supermarkets are not very common

C．few shopping centers are three-shift open at any hour

D．24-hour restaurants are not in practice in the great business capitals

The traveler said to himself, "I can't stand this any longer" means " ______."

A．I can't bear any longer

B．I can't stay hungry any longer

C．I can't keep my feet on this place any longer

D．I must sit down for a while

Which of the following is suggested by computer experts？

A．Don't rush to open any e-mail attachment.

B．Never open any e-mail attachment.

C．It's always safe to open an e-mail attachment from a friend.

D．Whenever you receive an e-mail, you should make a call to make sure whom it comes from.