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问题 单项选择题

女性，30岁，上腹部被马车压伤2h，查：全腹疼痛，腹肌紧张，压痛，反跳痛，有移动性浊音，腹穿穿刺出不凝血液，最可能是

A．阑尾穿孔，急性腹膜炎
B．胃十二指肠穿孔腹膜炎
C．阑尾周围脓肿
D．膈下脓肿
E．盆腔脓肿

答案

参考答案：D

综合

（5分）读下图，回答下列问题。

（1）图中甲、乙两点的经纬度分别是：甲. _______，乙. _______。

（2）图中山脉大致呈_______走向。

（3）量得甲、乙两地的图上距离为4厘米，两地的实地距离约为_______千米。

（4）图示地区气候的特点是_______。
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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.

19（）

A. even if

B. if only

C. only if

D. though
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