The 20th century saw many great inventions,such as airplanes,motion pictures,television,telephone,computer,the Internet,to list just a few.Each of the inventions bears witness to the amazing advancements in technology in the past century.The inventions made our lives much easier and much more enjoyable. However,progress in technology is always a double edged sword.People invented pesticides to kill pests but pesticides can pollute the environment by entering the water supplies and harming birds that eat the dead incts.Cell phone has greatly facilitated communication yet it has been proved that it pos danger to urs’health.What’s more,cell phones often go off during movies,concerts,class,meetings,and libraries and create public nuisance.Automobiles have become an indispensable tool to the modern man but they consume great amounts of fuel,and create enormous environmental problems.Also,many people are killed in car accidents every year.Internet links tens of millions of people around the world but people are so addicted to the Internet today that they don ’t go out and do exercis.
自我评语
In a word,technology can be put to good u only when it’s ud properly.People often find i
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t hard to balance the convenience brought by modern technology and its potentially harmful effects. Many people believe that the biggest disadvantage of technology is that it may give ri to some unimaginative negative influences.
I believe the average people should be educated about the potential harmness of technology and should always u it with a mind to promoting the teamwork spirit.
Today, we can't imagine ourlves without technological advances such as cars, microwaves, cell phones, computers, and televisions. However, technology won't stop here, but develop further. As technology develops, there are not only advantages, but disadvantages from them. The disadvantages of upgraded technology are that people will loo their jobs to machines that will do the work for them. In addition, machines and robots are too complex for most people to u.
As there are so many advantages from highly developed technology, there also is a great deal of disadvantages from them. One disadvantage is that as technology develops, robots and machines will take over many jobs and people will loo their jobs by contrast.
As people loo their jobs, they will have hard time getting money which would make it hard for them to continue to meet living expens. Moreover, as people u less money the economy would be difficult to control and especially if it is a country as large as the United States, the problem will influence the world greatly.
Another disadvantage of highly developed technology is that machines and robots are complex. It is hard to activate all the machines you have unless you can multitask. Think about it, if most people have trouble on computers and almost all of us don't know the actual limit of computers' abilities, how will us, normal people, work with all the robots and machines? Moreover, just like computers, robots and machines will easily break and most time you won't know how to fix them and one will have to call someone to fix them. People will loo their temper over this and it will create a large expen to repair them.
顿字开头的成语电脑的缺点：
醋布There is no denying that a computer offers us convenience and benefits. In spite of its advantages, its disadvantages are also evident. First, more and more students lo them
lves in computer games, which is not only waste of money but also waste of time. Second, there is much fal information on the Internet, and sometimes it is very difficult to distinguish what is true and what is fal. Some people even commit crimes through computers.
The disadvantages of the computer also exists in the matter of widespread access of internet. With internet, online crimes can be commited. Underage people are also able to view adults only websites. Another disadvantage of computer is that it's bad for eyes and general health.
The computer also has many is bad, if to the elementary student, I wants to say plays the computer the question. Now the family economical level enhanced, the elementary student vision dropped actually, this is plays the computer the fault. The advantage very are also many, for example chats, said the topic and so on some beneficial games can cau elementary student's after school life to be more interesting. But cannot sink confus in the computer games. Some real matter meant, a child,For computer games i
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n hypothesized duty battle, own jumped from an upper story. Therefore, plays the computer not to be able to fall, after on the one hand which falls to does not have the advantage.
The high tech product increas day by day,Computer the high tech product,Has brought many conveniently to the people,Might also bring the misfortune to the people
卡萨布兰卡简谱核弹的缺点：
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The main disadvantage is public fear and opposition, bad on Chernobyl, atomic bombs and Three Mile island, although Three Mile island does not really belong ion the same category as the other 2. That is just an indication of the level of public distrust when they equate Three Mile island with Chernobyl. There is no comparison at all.
The next disadvantage is cost. Nuclear is expensive. Partly due to safety measures and partly becau uranium is a rare and expensive fuel.
The newest, and possibly most damaging disadvantage is nuclear proliferation. The world does not want to e nuclear reactors in the hands of every country in the world, becau it would make nuclear weapons much easier for tho countries to build. It is one thing for the U.S and France to have reactors, and another for Libya, Iran and North Korea to have them.
On the up side, nuclear plants do not emit carbon dioxide, or any pollutants really. And they are really powerful. The main disadvantage with wind and solar is how weak it is. Nuclear definitely does not have that problem.
