Man is a land animal, but he is also closely tied to the sea. Throughout history the sea has served the needs of man. The sea has provided man with food and a convenient way to travel to many parts of the world. Today, nearly two—thirds of the world's population live within 80 kilometers of the sea coast.

    In the modern technological world, the sea offers many resources to help mankind survive (=continue to live). Resources on land are beginning to be used up. The sea, however, still can be hoped to supply many of man's needs.

    The list of riches of the sea yet to be developed by man's technology is impressive. Oil and gas explorations have been carried out for nearly 30 years. Valuable amounts of minerals exist on the ocean floor ready to be mined (开采).

    Fish farming promises to be a good way to produce large quantities of food. The culture of fish and shellfish (贝类动物) is an ancient skill practised in the past mainly by Oriental people.

    Besides oil and gas, the sea may offer new sources of energy. Experts believe that the warm temperature of the ocean can be used in a way similar to the steam in a steamship. Ocean currents (水流) and waves offer possible use as a source of energy.

    Technology is enabling man to explor ever more deeply under the sea. The development of strong, new materials has made this possible.

    The technology to harvest the sea continues to improve. Experts believe that by the year 2000 the problems that prevent us from exploiting fully the food, minerals, and energy sources of the sea will be largely solved.

    Populations of white-tailed deer (白尾鹿) are growing rapidly in many parts of the United States. As populations grow, food becomes a problem. Many deer die of hunger. Others grow up small and unhealthy. In search of food, hungry deer move closer to where humans live. They eat farm crops, vegetables and even trees. Besides, increased numbers of deer near roads can cause traffic accidents.

    People admire the grace and fast speed of deer. Most people don't want these animals to be hungry and ill. Should people take action to control the growing deer populations?

Should People Take Direct Action?

    Many people think that hunting (打猎) is the best way to control the animal populations. Wildlife managers will see if there's enough food in an area and decide its carrying capacity (容量). Then hunters with licenses are sent to help control the number of deer. Hunting is usually not allowed in cities or suburbs, however.

    Some people have the idea to catch the deer and move them to other places. But this method is expensive and requires finding another place that can accept the deer without breaking the balance of ecosystem.

    Scientists are also working to develop chemicals to control the birth rate in deer populations. But this plan works for only one year at a time.

Should People Take Indirect Action?

    Some suggest bringing in natural enemies of deer, such as wolves, lions and bears, to areas with too many deer. But these animals could also hurt dogs, cats, and even humans. Other communities have built tall fences (篱笆) around areas to keep out the deer. However, this is impossible for farmers.

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    Some people are against any kind of action. They support leaving the deer alone. Animal populations in an area naturally go up and down over time. Doing nothing means that some deer will die of hunger or illness. But finally, the population will reach a size within the carrying capacity of the environment. So, let nature go its own way.

    It is reported that some developed countries have shipped broken parts of computers to China. Such a thing can be found almost every day although it is against international laws. Hong Kong officers once found 131, 000 kilograms of broken computers, TVs and phones sent from Japan.

    Things like these are called electronic waste or e-waste. Dealing with e-waste is not an easy job because dangerous poisons like mercury(汞)and lead(铅)can be found in e-waste. Every time an old computer breaks down, it needs to be dealt with safely. But at present, broken computer parts are usually buried. It may be hundreds of years before they are really gone in the earth.

    Many places in China are polluted by e-waste. Guiyu in Guangdong Province is one of them. This town is named as" the e-waste capital of the world”. It has to deal with 1. 5 million kilograms of e-waste each year, from which it makes 75 million yuan. But it comes at a cost. Many of the poisons in e-waste find their way into the environment. Plastic is burned outdoors and chemical water is poured into rivers. An environmental group has found the air, the earth and the rivers in Guiyu badly polluted.

    The Chinese government wants to develop, but in a way that doesn't do harm to the environment and people's life. China passed a new environmental protection law in 2015, the strictest one we have ever ha   D. Computer companies like Lenovo and Dell will be asked to take back their old computers. This is because the companies that make computers know how to deal with them safely. Hopefully, the problem with e-waste will be solved in the near future.

    We all know that many inventions have changed our life a lot. They play important roles in our daily life. Here are some interesting inventions.

Dear Meimei,

I am happy to receive your last letter. You asked me what my favorite dream job is. To tell you the truth, I am going to be a {#blank#}1{#/blank#}because I like meeting interesting people. I will {#blank#}2{#/blank#}to Beijing. Beijing is a big and fantastic place. {#blank#}3{#/blank#}my free time, I will spend time with my best friends. Maybe I will keep a cat {#blank#}4{#/blank#}a pet.

How about your dream job? {#blank#}5{#/blank#}are you going to be and where are you going to work?

Write soon.