下列说法中正确的是 ( ) A.光的干涉现象说明光具有波动性,光的衍射现象说明光

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问题:

下列说法中正确的是 (   )
A.光的干涉现象说明光具有波动性,光的衍射现象说明光是横波

B.光电效应现象说明了光具有粒子性

C.在电磁波谱中,波长很短的γ光子只具有粒子性

D.光在任何介质中的速度都相同是狭义相对论的基本假设之一

考点:光的波粒二象性狭义相对论的两个基本假设
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血脂调节药合理应用应注意以下哪些问题()

A.定期检查血脂及肝肾功能

B.慎选联合用药

C.初始剂量宜小

D.提倡晚餐或晚餐后服药

E.勿随意停药

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下列有关“血红蛋白的提取和分离”的相关叙述中,正确的是  [ ]

A.用蒸馏水进行红细胞的洗涤,其目的是去除细胞表面杂蛋白

B.将血红蛋白溶液进行透析,其目的是去除相对分子质量较大的杂质

C.血红蛋白释放时加入有机溶剂,其目的是使血红蛋白溶于有机溶剂

D.这个过程不断用磷酸缓冲液处理,是为了维持血红蛋白的结构

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情景交际:选择方框中的句子完成对话,其中有两项多余。
A: Hi, Jim. How was your weekend?
B: Wonderful.   1  
A: Not bad. I phoned you at five o'clock yesterday afternoon.   2  
B: I was playing ping-pong with my friend at that time.   3  
A: I was chatting with my friends on the Internet. We talked a lot about the ways of learning English.
B: Sounds great!
A: Yes. I phoned you and wanted you to join us.
B:   4   What did they say about that?
A: One of my friends thinks: first we should practice listening English a lot. Then you speak it out.
B: I quite agree. Please let me know next time.
A:   5   Bye!
B: Bye-bye!
A. What a pity!
B. What about yours?
C. But nobody answered.
D. What did you do yesterday afternoon?
E. What were you doing yesterday afternoon?
F. That's great!
G. No problem.
题型:选择题

患者,女,24岁,已婚。停经49天时诊为早孕,近3天少量 * * 流血,尿妊娠试验(+)既往曾2次流产。其诊断是()

A.妊娠腹痛

B.胎动不安

C.胎漏

D.堕胎

E.滑胎

题型:选择题

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.\

The public launched a demonstrations against the summit with respect to()

A. political difficulties

B. its p influence

C. imaginative ideals

D. its social welfare

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