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Generally, a computer is any device that can perform. numerical calculations. Currently, 【

1】, the term usually refers【2】an electronic device that can【3】a series of tasks according to a set of instructions.

In 1953 there were only about 100 computers【4】use in the world. Today hundreds of millions of computers are【5】in homes, schools, businesses, government offices, and universities for almost every conceivable【6】.

Modern desktop【7】computers, or PCs, are many times more powerful than the huge, million dollar【8】of computers of the 1960s and 1970s. Most PCs can perform. from 400 million to several billion operations per second. These computers are used not【9】for household management and personal entertainment, but also for most or the automated【10】required by small business. The fastest desktop computers are called workstations, and they are generally used for scientific, engineering, or advanced business application.

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第1题

An output device is any computer component capable of（72)information to a user.A．conveying

An output device is any computer component capable of(72)information to a user.

A．conveying

B．sending

C．giving

D．linking

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第2题

1．We can learn from the text that a computer can ______. A．be best used as a calculating device B．

1．We can learn from the text that a computer can ______.

A．be best used as a calculating device

B．be best used in word processing

C．find uses almost everywhere

D．have intelligence of its own

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第3题

We can learn from the text that a computer can ______. A．be best used as a calculating device B．be

We can learn from the text that a computer can ______.

A．be best used as a calculating device

B．be best used in word processing

C．find uses almost everywhere

D．have intelligence of its own

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第4题

We can learn from the text that a computer can ______. A．be best used as a calculating device B．be

We can learn from the text that a computer can ______.

A．be best used as a calculating device

B．be best used in word processing

C．find uses almost everywhere

D．have intelligence of its own

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第5题

If PTN device is found not reporting alarms to EMS, you can execute()on the device to

If PTN device is found not reporting alarms to EMS, you can execute（)on the device to

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第6题

Why shouldn't we use a word that can be found in any dictionary as a password？A．Because it

Why shouldn't we use a word that can be found in any dictionary as a password？

A．Because it can be easily remembered by a computer hacker.

B．Because computer programs can crack it.

C．Because computer hackers are determined to crack it.

D．Because the lists are so huge that the words are not easy to remember.

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第7题

Which of the following is NOT true according to the text？ A．Firewalls can protect your computer fro

Which of the following is NOT true according to the text？

A．Firewalls can protect your computer from any hostile attack.

B．Intruders can hack into virtually any computer.

C．A changing IP address is relatively safer.

D．A static IP address leaves a computer vulnerable to outside attacks.

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