问题 单项选择题

依次填入下面一段文字横线处的语句,衔接最恰当的一组是:
任何国家在任何时候都不能忽视粮食安全问题。中国多年来______,______,______,______,______,______。
①实现了粮食供应从长期短缺到总量基本平衡、丰年有余的历史性转变
②以占世界7%的耕地养活了占世界22%的人口
③使粮食产量不断攀升
④坚持以自力更生为主的粮食安全战略
⑤推广良种、改善水利条件、精耕细作
⑥在上世纪末突破5亿吨大关

A.④⑥②⑤③①
B.④⑤③⑥①②
C.⑤①⑥④③②
D.⑤④③⑥②①

答案

参考答案:B

解析: 本题重点考查考生语言表达连贯和文章逻辑顺序安排的能力,需要通读全部文句,理清思路,把握文段内容。本段文字主要讲我国如何重视粮食安全问题,注意句子间的因果关系,便可解答。

口语交际,情景问答题
单项选择题

Even plants can run a fever, especially when they are under attack by insects or disease. But (1) humans, plants can have their temperature (2) from 3,000 feet away—straight up. A decade ago, (3) the infrared scanning technology developed for military purpose and other satellites, physicist Stephen Paley (4) a quick way to take the temperature of crops to determine (5) ones are under stress. The goal was to let farmer (6) target pesticide spraying (7) rain poison on a whole field, which (8) include plants that don’t have the pest problem.

Even better, Paley’s Remote Scanning Services Company could detect crop problem before they became (9) to the eye. Mounted on a plane flown at 3,000 feet (10) , an infrared scanner measured the heat emitted by crops. The data were (11) into a color-coded map showing (12) plants were running "fevers". Farmers could then spot spray, using 50 to 70 percent less pesticide than they (13) would.

The bad news is that Paley’s company closed down in 1984, after only three years. Farmers (14) the new technology and long-term backers were hard (15) . But with the renewed concern about pesticides on produce, and refinements in infrared scanning, Paley hopes to (16) into operation. Agriculture experts have no doubt about the technology works. "This technique can be used (17) 75 percent of agricultural land in the United States," says George Oerther of Texas A&M. Ray Jackson, who recently retired from the Department of Agriculture, thinks (18) infrared crop scanning could be adopted by the end of the decade. But (19) Paley finds the financial backing (20) he failed to obtain 10 years ago.

3()

A.adopted

B.adopting

C.adapted

D.adapting