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问题 单项选择题 A1/A2型题

为确保小组讨论的效果，在小组讨论时应该（）

A.由小组成员现场讨论确定本次讨论的主题和提纲

B.参与小组讨论的人数不限

C.讨论时间由小组成员的讨论兴致和讨论的进展状况而定

D.小组成员可以随便就座

E.讨论地点应选择小组成员感觉舒适、方便的地方

答案

参考答案：E

解析：小组讨论时，讨论前应首先明确讨论主题，拟定讨论提纲；根据讨论的主题，选择相关的人员组成小组，人数一般以6～10人为宜；讨论的时间一般掌握在1小时左右；讨论地点应选择小组成员感觉舒适、方便的地方。

单项选择题

候选关键字中的属性称为______。

A．非主属性

B．主属性

C．复合属性

D．关键属性
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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.

12（）

A.how

B.where

C.what

D.when
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