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This task designs a simple access control system i...

This task designs a simple access control system including 4 buttons and 1 7-segment display driver. The basic functions are as follows: 4 buttons, respectively representing the numbers 0,1,2.3 The password is set in advance in the program, with the number between 0 and 3 The 7-segment tube displays "-", indicating waiting for password input When the password is entered correctly, the character "P" is displayed about 3s, and the lock is opened through P3.0; Otherwise, the character "E" is displayed, about 3s, and the lock remains locked.

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第1题

It is plain that in the year 2020 everyone will have at his elbow several times more mechanical energy than he has to-day.

There will be advances in biological knowledge as far-reaching as those that have been made in physics.

We are only beginning to learn that we can control ourbiological environment as well as our physical world population: by Malthus in about 1800’by Cripples in about 1900. it was and the second time by using the new fertilizers. In the year 2020, starvation will be headed off by the control of the dis-eases and the herdity(遗传) of plants and animals –by shaping our own biological environment.

Now I come back to the haunting theme of automation. The most common species in the factory today is the man who works or minds a simple in the factory today is the man who works or minds a simple machine—the operator. By the year 2020, the repedtitive tasks of industry will be taken over by the machines, as the heavy tasks were over long ago; and the mental tedium(乏味) will go the way of physi cal exhaustion. Thoday we still distinguish, even among repetitive jobs, between the skilled and the unskilled; but in the year 2020 all repetition will be unskilled. We simply waste our time if we oppose this change; it is as inevitable as the year 2020 itself.

The article was written to _______.

A.warn us of the impending(即将发生) starvation

B.present facts about life in the near future

C.oppose biological advances

D.warn of the evil side of automation

Advances in biological knowledgeA.kept pace with advances in physics

B.responsible for the invention of new machines

C.surpassed those in physics

D.lagged behind those in physics

According to the passage, starvation_________.A.can be predicted

B.is unavoidable

C.can be prevented

D.is mainly caused by poor agriculture

Repetitive tasks in industry lead to _________.A.physical exhaustion

B.mental stimulation

C.mental exhaustion

D.extinction

If the predictions of the writer are realized, the demand for the unskilled workers in 21st century will be_________.A.very high

B.very low

C.the same as today

D.constantly rising

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第2题

It is plain that in the year 2020 everyone will have at his elbow several times more mechanical energy than he has to-day.

There will be advances in biological knowledge as far-reaching as those that have been made in physics.

The article was written to _______.

A.warn us of the impending(即将发生) starvation

B.present facts about life in the near future

C.oppose biological advances

D.warn of the evil side of automation

Advances in biological knowledgeA.kept pace with advances in physics

B.responsible for the invention of new machines

C.surpassed those in physics

D.lagged behind those in physics

According to the passage, starvation_________.A.can be predicted

B.is unavoidable

C.can be prevented

D.is mainly caused by poor agriculture

Repetitive tasks in industry lead to _________.A.physical exhaustion

B.mental stimulation

C.mental exhaustion

D.extinction

If the predictions of the writer are realized, the demand for the unskilled workers in 21st century will be_________.A.very high

B.very low

C.the same as today

D.constantly rising

请帮忙给出每个问题的正确答案和分析，谢谢！

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第3题

It is plain that in the year 2020 everyone will have at his elbow several times more mechanical energy than he has to-day.

There will be advances in biological knowledge as far-reaching as those that have been made in physics.

We are only beginning to learn that we can control ourbiological environment as well as our physical world population: by Malthus in about 1800’by Cripples in about it was and the second time by using the new fertilizers. In the year 2020, starvation will be headed off by the control of the dis-eases and the herdity(遗传) of plants and animals –by shaping our own biological environment.

31. The article was written to _______.

A.warn us of the impending(即将发生) starvation

B.present facts about life in the near future？

C.oppose biological advances

D.warn of the evil side of automation

Advances in biological knowledgeA.kept pace with advances in physics

B.responsible for the invention of new machines

C.surpassed those in physics

D.lagged behind those in physics

If the predictions of the writer are realized, the demand for the unskilled workers in 21st century will be_________.A.very high

B.very low

C.the same as today

D.constantly rising

According to the passage, starvation_________.A.can be predicted

B.can be prevented

C.is mainly caused by poor agriculture

D.is unavoidable

Repetitive tasks in industry lead to _________.A.physical exhaustion

B.mental stimulation

C.mental exhaustion

D.extinction

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第4题

Supervising employees by remote control requires more skills than when employees are within physical reach.

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第5题

Task 2

Directions: This task is the same as Task 1. The 5 questions or unfinished statements are numbered 41 through 45.

From the beginning rivers have played an important part in the life of man. Primitive man used rivers as a means of travel.

In ancient times, man settled near rivers or on river banks and built up large empires and civilizations. Rome today still stands on both sides of the Tiber. The Menam runs through modern Bangkok, still serving as a great waterway for the transport of goods and people.

Water is Nature's most precious gift to man. Man needs water to irrigate his crops, to cook and to wash. In nations far and wide rivers means life and wealth. The Irrawady, Nile, Gangas and a host of other feed and clothe the nation around them. A shortage of water in heavily populated agricultural areas will cause great hardship and starvation as crops fail.

Water is also a source of energy and power. Man constructs huge dams across rivers to control the water for irrigation and obtain the energy needed to drive generators. The electrical power is then channeled to homes, cities factories, television stations and the military.

Man uses billions of liters of water each day. His main source of water comes from reservoirs which in turn obtain their water from the rivers.

Rivers have been important to man ______.

A．since the last century

B．for a very long time

C．since a few years ago

D．since a few hundred years ago

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第6题

● A transport layer protocol usually has several responsibilities. One is to create a process-to-process communication; UDP uses （71） numbers to accomplish this. Another responsibility is to provide control mechanisms at the transport level. UDP does this task at a very minimal level. There is no flow control mechanism and there is no （72） for received packet. UDP,however, does provide error control to some extent. If UDP detects an error in the received packet, it will silently drop it．

The transport layer also provides a connection mechanism for the processes. The （73） must be able to send streams of data to the transport layer. It is the responsibility of the transport layer at （74） station to make the connection with the receiver, chop the stream into transportable units,number them, and send them one by one. It is the responsibility of the transport layer at the receiving end to wait until all the different units belonging to the same process have arrived, check and pass those that are （75） free, and deliver them to the receiving process as a stream.

（71）A．hop B．port C．route D．packet

（72）A．connection B．window C．acknowledgement D．destination

（73）A．jobs B．processes C．programs D．users

（74）A．sending B．routing C．switching D．receiving

（75）A．call B．state C．cost D．error

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第7题

Task 4

Directions: The following is a list of terms related to Security. After reading it, you are required to find the items equivalent to (与…等同) those given in Chinese in the table below. Then you should put the corresponding letters in the brackets on the Answer Sheet, numbered 51 through 55.

A ----------------- air traffic control system

B ----------------- armed police

C ----------------- crime prevention

D ----------------- entry requirement

E ----------------- international criminal police organization

F ----------------- level of security

G ----------------- picket line

H ----------------- police station

I ----------------- patrolling vehicle

J ----------------- safety precaution measure

K ----------------- safety control device

L ----------------- security command center

M ----------------- security service

N ----------------- security control center

O ----------------- security personnel

P ----------------- valid documents

Q ----------------- security monitoring and control

Examples: ( M ) 保安服务 ( G ) 警戒线

51. ( ) 空中交通管制系统 ( ) 安全预防措施

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