他认为，唯一的办法是使不同种类的水稻杂交，这样就能生产比原先任何一种水稻产量都要高的新品种。

　　3.Moving in a wheelchair and speaking through a special computer，he has become the voice of science.

　　靠轮椅来移动并且通过特殊的电脑说话，他(霍金)成为了科学的代言人。

　　4.Or was he carried miles into space，becoming the world’s first astronaut?

　　还是他被带到了数英里之外的太空，成了世界上第一位宇航员？

　　5.The tubes were attached to a long stick which helped keep the rocket moving in a straight direction.

　　竹管被绑在一根帮助火箭直线运动的长棍上。

　　Ⅳ.课文语法填空

　　Yuan Longping is a 1.leading(lead) figure in the rice­growing world in China.He was interested in plants from 2.an early age，and he went to study agriculture in college and began crop breeding experiments 3.as a young teacher.Then he brought up a plan to produce 4.more(much) rice by crossing different species of rice plant.He put his plan 5.into practice and the results 6.were published(publish) in China in 1966.In 1970，he discovered a 7.naturally(natural) sterile male rice plant,8.which was a breakthrough.

　　As a result of Yuan Longping’s discoveries，Chinese rice production rose 9.by 47.5% in the 1990’s,10.and 50,000 square kilometres of rice fields were converted to growing vegetables and other cash crops.Besides，some other countries shared the result of his discoveries.

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