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1、精选优质文档-倾情为你奉上 UNIT2 A PIONEER FOR ALL PEOPLE Although he is one of China's most famous1 _(scientist), Yuan Longping considers himself a farmer, for he works the land to
2、60;do his research. Indeed, his sunburnt face and arms and his slim, strong body are just like those of millions of Chinese farmers, for whom he2 _(struggle) for
3、0;the past five decades. Dr Yuan Longping grows3 _ is called super hybrid rice. In 1974, he became the first agricultural pioneer in the world 4_(grow)rice that has&
4、#160;a high output. This special strain of rice makes5_ possible to produce one-third more of the crop in the same fields. Now more than 60% of the rice6 _(prod
5、uce) in China each year is from this hybrid strain. 7_(bear)into a poor farmer's family in 1930, Dr Yuan graduated 8_Southwest Agricultu
6、ral College in 1953. Since then, finding ways to grow more rice 9_( be) his life goal. As a young man, he saw the great need for increasing the rice o
7、utput. At that time, hunger was a 10_(disturb) problem in many parts of the countryside. Dr Yuan searched for a way to increase rice harvests without11 _(expand)the
8、area of the fields. In 1950, Chinese farmers could produce only fifty million tons of rice. In a recent harvest, however, nearly two hundred million tons of rice
9、0;was produced. These increased harvests mean that 22% of the world's people are fed from just 7% of the farmland in China. Dr Yuan is now circulating his k
10、nowledge in India, Vietnam and many other less 12_(develop) countries to increase their rice harvests. Thanks to his research, the UN has more tools in the battle to
11、 rid the world 13_ hunger. Using his hybrid rice, farmers are producing harvests twice as large as before. Dr Yuan is quite14 _(satisfy)
12、 with his life. However, he doesn't care about being famous. He feels it gives him less15 _(free) to do his research. He would much rather 16_(keep) time fo
13、r his hobbies. He enjoys listening to violin music, 17_(play) mah-jong, swimming and reading. Spending money on himself or leading a comfortable life also18_(mean)very little
14、 to him. Indeed, he believes that a person with too much money has more rather than fewer 19_(trouble). He therefore gives millions of yuan to equip others20 _&
15、#160;their research in agriculture. Just dreaming for things, however, 21_(cost) nothing. Long ago Dr yuan had a dream about rice plants as
16、160;tall as sorghum. Each ear of rice was as big as an ear of corn and each grain of rice was as huge as a peanut. Dr Yuan22 _(awake) from his dr
17、eam with the hope of producing a kind of rice23 _could feed more people. Now, many years later, Dr Yuan has another dream: to export his rice so that it
18、60;can be grown around the 24_(global.) One dream is not always enough, especially for a person25_ loves and cares for his people CHEMICAL OR ORGANIC FARMING? Over
19、the past half century,1 _(use) chemical fertilizers has become very common in farming. Many farmers welcomed them as a great way2 _(stop)crop disease and increase production.&
20、#160;Recently,3_ , scientists have been finding that long-term use of these fertilizers can cause damage4_ the land and, even more dangerous, to people's5 _(healthy).
21、60; What are some of the problems caused by chemical fertilizers? First, they damage the land by killing the 6_(help)bacteria and pests as well as the harmful ones.&
22、#160;Chemicals also stay in the ground and underground water for a long time. This affects crops and, therefore, animals and humans, since chemicals get inside the crops&
23、#160;and cannot just be washed off. These chemicals in the food supply7_(逐渐累积) in people's bodies over time. Many of these chemicals can8_ (导致) cancer or other illnes
24、ses. In addition, fruit, vegetables and other food 9_(grow) with chemical fertilizers usually grow too fast to be full of much nutrition. They may look beautiful, but
25、0;inside there is usually more water than vitamins and minerals. With these10_ (discovery) ,some farmers and many customers are beginning to turn to11_ (o
26、rgan) farming. Organic farming is simply farming without using any chemicals. They focus on12 _(keep) their soil rich and free of disease. A healthy soil reduces disease&
27、#160;and helps crops grow13 _(strength) and healthy. Organic farmers, therefore, often prefer 14_(use) natural waste from animals as fertilizer. They feel that this makes the
28、soil in their fields richer in minerals and so more fertile. This also keeps the air, soil, water and crops free15 _ chemicals. Organic farmers also use
29、;many other methods to keep the soil 16_(fertilizer). They often change the kind of crop in each field 17_(每隔几年), for example, growing corn or wheat and then the
30、0;next year peas or soybeans. Crops such as peas or soybeans put important minerals back into the soil,18 _ (make) it ready for crops such as wheat or corn that need rich
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