波数的单位符号为( )。 A．kPa B．Pa·s C．mm2/s D．cm-1

配送按组织者进行分类，可分为（）。

A.企业内部，企业间的配送及企业对消费者的配送

B.定时配送与准时制物流配送

C.定量配送与定路线配送

D.共同配送与加工配送

患者，男，28岁，近中倾斜阻生，远中颈部可疑龋坏。现拟拔除

患者出现拔牙窝持续性疼痛向耳部放射，检查见拔牙窝内无血凝块，表面有灰白色假膜覆盖，有明显臭味，应诊断为（）

A.牙槽脓肿

B.干槽症

C.急性根尖周炎

D.拔牙术后正常反应

E.牙槽骨创伤

高中生活是人一生中最美好的时光，除了学业之外，我们还经历，感悟了许多。为了在毕业前不留下遗憾，我们搞好备考复习的同时，是不是还该做点什么？请根据提示的要点写一篇英语短文，谈谈你的想法。

1.向老师表示感谢 2.跟对你有误解的同学谈一谈 3.征求同学的宝贵意见 4.再为班级做件有意义的事情

注意：1.可适当加入细节，使行文连贯

2.短文的单词数：100左右（开头已给出的单词不计入单词总数）

High school is regarded as the best time of my life. Besides classes and homework, there’s some thing that I especially treasure. In order to leave school with no regrets…

__________________________________________________________________________________

通过实验观察，已知X气体有下列性质：①五色、无味、难溶于水；②密度约是空气的1/14；③燃烧时发出淡蓝色火焰；④具有还原性。则X为( )。

A．氧气
B．一氧化碳
C．氢气
D．二氧化碳

The European Union’s Barcelona summit, which ended on March 16th, was played out against the usual backdrop of noisy "anti-globalization" demonstrations and massive security. If nothing else, the demonstrations illustrated that economic liberalization in Europe--the meeting’s main topic--presents genuine political difficulties. Influential sections of public opinion continue to oppose anything that they imagine threatens "social Europe", the ideal of a cradle-to-grave welfare state.

In this climate of public opinion, it is not surprising that the outcome in Barcelona was modest. The totemic issue was opening up Europe’s energy markets. The French government has fought hard to preserve a protected market at home for its state-owned national champion, Electricite de France (EDF). At Barcelona it made a well-flagged tactical retreat. The summiteers concluded that from 2004 industrial users across Europe would be able to choose from competing energy suppliers, which should account for "at least" 60% of the market.

Since Europe’s energy market is worth 350 billion ( $ 309 billion) a year and affects just about every business, this is a breakthrough. But even the energy deal has disappointing aspects. Confining competition to business users makes it harder to show that economic liberalization is the friend rather than the foe of the ordinary person. It also allows EDF to keep its monopoly in the most profitable chunk of the French market.

In other areas, especially to do with Europe’s tough labor markets, the EU is actually going backwards. The summiteers declared that "disincentives against taking up jobs" should be removed; 20m jobs should be created within the EU by 2010. But only three days after a Barcelona jamboree, the European Commission endorsed a new law that would give all temporary-agency workers the same rights as full-timers within six weeks of getting their feet under the desk. Six out of 20 commissioners did, unusually, vote against the measure--a blatant piece of re-regulation--but the social affairs commissioner, Anna Diamantopoulou, was unrepentant, indeed triumphant. A dissatisfied liberaliser in the commission called the directive "an absolute disaster".

The summit’s other achievements are still more fragile. Europe’s leaders promised to increase spending on "research and development" from its current figure of 1.9% of GDP a year to 3%. But how will European politicians compel businesses to invest more in research Nobody seems to know. And the one big research project agreed on at Barcelona, the Galileo satellite-positioning system, which is supposed to cost 3.2 billion of public money, is of dubious commercial value, since the Europeans already enjoy free access to the Americans’ GPA system. Edward Bannerman, head of economics at the Centre for European Reform, a Blairite think-tank, calls Galileo "the common agricultural policy in space.\

What is the passage mainly about（）

A. A review of EU’s Barcelona summit

B. About merits of a EU’s summit

C. A survey of Europe’s competitors

D. About the achievements of the EU