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问题 单项选择题

在WWW上的多媒体检索工具主要是基于（ ）。

A．文本信息

B．超文本信息

C．图形图像信息

D．超级图形图像信息

答案

参考答案：B

解析：研制开发队伍的组成方式有自行开发型、委托承包型、联合开发型、 顾问开发型等4种，这4种方式中我们提倡顾问开发型，即应尽量避免单纯依靠外力。 从根本上讲，必须在系统建设中培养起组织自身的技术力量和系统的组织管理人员。

单项选择题

（）评估所关注的是一项具体项目的结果。

A.政策过程评估

B.政策影响评估

C.政策效果评估

D.元评估
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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.

15（）

A. to find out

B. to be found

C. to find

D. to be found on
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