问题 单项选择题 A3/A4型题

某患者由于盆腔脓肿手术,发现回盲部有一瘘管,切除的结肠肠管黏膜面可见鹅卵石样改变,多个纵行性裂隙存在。

该病可能出现的合并症,不包括哪一项()

A.肠梗阻

B.肠瘘

C.吸收不良

D.癌变

E.中毒性结肠炎

答案

参考答案:E

问答题

(6分)阅读短文,回答问题

LED节能灯

LED节能灯是用高亮度发光二极管作光源,LED作为一种新型的节能、环体的绿色光源产品,具有很多诱人的特性。例如:

a高效节能:1 000小时仅耗几度电(普通60 w白炽灯17小时耗l度电,普通10 w节能灯1 00小时耗l度电);

b超长寿命:半导体二极管发光,无灯丝,无玻璃泡,不怕震动,不易破碎,使用寿命可达五万小时(普通白炽灯使用寿命仅有一千小时,普通节能灯使用寿命也只有八千小时);

c健康:光线健康。光线中不舍紫外线和红外线(普通灯光中舍有紫外线和红外线);

d绿色环保:不含汞和氙等有害元素,利于回收,而且不会产生电磁干扰(普通灯管中含有汞和铅等元案,节能灯中的电子镇流器会产生电磁干扰);

e保护视力:直流驱动,无频闪(普通灯都是交流驱动,就必然产生频闪);

f光效率高:发热小,90%的电能转化为可见光(普通白炽灯8 0%的电能转化为内能,仅有20%电能转化为光能)。

LED节能灯必将会得到推广,在节能减排的浪潮中大放光彩。

请回答下列问题:

(1)LED节能灯是用                     作光源的;工作时把      能转化为光能。

(2)普通白炽灯光效率低的原因是:                                           

(3)普通40 w白炽灯正常工作        小时耗1度电。而一盏LED节能灯工作200小时才消耗1度电,则此灯的电功率是      w。

(4)我们        (填“能”或“不能”)看到普通灯光中含有的紫外线和红外线。

单项选择题

European farm ministers have ended three weeks of negotiations with a deal which they claim represents genuine reform of the common agricultural policy (CAP). Will it be enough to kick off the Doha world trade negotiations

On the face of it, the deal agreed in the early hours of Thursday June 26th looks promising. Most subsidies linked to specific farm products are, at last, to be broken--the idea is to replace these with a direct payment to farmers, .unconnected to particular products. Support prices for several key products, including milk and butter, are to be cut-that should mean European prices eventually falling towards the world market level. Cut-ting the link between subsidy and production was the main objective of proposals put forward by Mr. Fischler, which had formed the starting point for the negotiations.

The CAP is hugely unpopular around the world. It subsidizes European farmers to such an extent that they can undercut farmers from poor countries, who also face trade barriers that largely exclude them from the potentially lucrative European market. Farm trade is also a key feature of the Doha round of trade talks, launched under the auspices of the World Trade Organization (WTO) in November 2001. Developing countries have lined up alongside a number of industrial countries to demand an end to the massive subsidies Europe pays its farmers. Several Doha deadlines have already been missed because of the EU’s intransigence, and the survival of the talks will be at risk if no progress is made by September, when the world’s trade ministers meet in Cancun, Mexico.

But now even the French seem to have gone along with the deal hammered out in Luxembourg. Up to a point, anyway. The package of measures gives the green light for the most eager reformers to move fast to implement the changes within their own countries. But there is an escape clause of sorts for the French and other reform-averse nations. They can delay implementation for up to two years. There is also a suggestion that the reforms might not apply where there is a chance that they would lead to a reduction in land under cultivation.

These 1et-outs are potentially damaging for Europe’s negotiators in the Doha round. They could significantly reduce the cost savings that the reforms might otherwise generate and, in turn, keep European expenditure on farm support unacceptably high by world standards. Mote generally, the escape clauses could undermine the reforms by encouraging the suspicion that the new package will not deliver the changes that its supporters claim Close analysis of what is inevitably a very complicated package might confirm the sceptics’ fears.

The deal agreed on Thursday looks promising in that()

A. European farm ministers finally reached a consensus.

B. the link between farm products and subsidies is removed.

C. farmers would definitely accept the direct payment to them.

D. European farm products will reach a lower price level than the world.