Scientific and technological advances have improved our daily lives. However, in many fields scientists cannot solve the problems they have created themselves. Do you agree or disagree with this opinion? Give your reasons. Write a composition of about 400 words on this topic.

正确答案：
Scientific and technological advances have, admittedly, improved people's daily lives and dramatically changed the way people live. People nowadays actually owe a great debt to the inventors who have pushed forward the development of science and technology. However, I am a strong believer in the claim that scientists in many fields cannot solve the problems they have created themselves, for the following reasons :
The creation of a new scientific and technological product is a purely academic matter, but its application may be affected by political, historical and military factors. For example, the original purpose of cloning was simply scientific—to change undesirable genes at the embryo stage, and to alleviate pain and illness of the patients. However, some people with ulterior motives may take advantage of this technique to clone human genes. This is sure to cause serious moral uncertainty and chaos for the human race. The inventors of cloning might have never imagined that the technology is now used for dishonorable purposes, and they can only rely on the government to prohibit human cloning by enforcing strict laws.
Sometimes it is impossible for researchers and scientists to predict the future application of the product they are working on. Atomic energy is a case in point. Its study and research are conducted with the aim of saving the world's limited energy resources and optimizing the use of current energy sources, such as water. Yet people are saddened by the news that atomic technology is used to manufacture dangerous weapons for the purpose of threatening or even destroying other countries and innocent people. For example, to retaliate Japan's attack on its Pearl Harbour, the United States dropped two atomic bombs in Hiroshima and Nagasaki, causing huge mortality and destruction, which were absolutely never dreamed by the scientists who invented the weapon. And once it was put into military use, the inventors could do nothing to change the fearful result.
In conclusion, scientists in many fields find themselves helpless when it comes to controlling the application of the technology they have labored so hard to produce and to solve the problems they have created.

解析：
针对“科学家无法解决一些科技进步带来的问题”这一观点，范文作者在第一段末表示赞同。第二、三段具体解释了赞同的原因。首先，科技的应用受到政治、历史和军事因素的影响。其次，科学家不能完全预测产品的未来用途。其中恰当地运用了实例支持分论点。结尾段简洁地总结了中心思想。