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在弱势有效市场中，所有公开的可用信息假定都被反映在证券价格中。( )
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TEXT G First aid may be defined as the immediate and temporary care given to a victim of an accident or serious illness until the supersedes of a physician can be obtained. First aid commences with the steadying effect upon the stricken person when he realizes that competent hands will help him. The emergency situation often causes confusion in the mind of the victim, things seem unreal and remote, and he often cannot think clearly and rationally for some time. The emotional reaction which results from a serious accident takes time to subside. Therefore, first aid is more than the physical attention dressing his injuries or making him comfortable. It is the general mental effect that the well-selected word of encouragement, the expression of willingness to help, the uplifting effect of the first aider’s evident capability can be given. The thoughtful for suggestions made to solve immediate problems, the information given concerning nearby physicians and hospitals, the telephone call to summon medical help or an ambulance or to notify a relative, these too are first aid. The good first aider deals with the whole situation, the person and the injury. He knows what not to do as well as to do. Thus, he avoids the error so commonly made through well meant but misguided efforts. He confines his procedures to what is necessary, keeping the handling of injured parts to a minimum. Which factor does first aid not usually include
信息在证券投资分析中起着十分重要的作用，信息的多寡、信息质量的高低将直接影响证券投资分析的效果，影响分析报告的最终结论。( )
Public officials and candidates for public office routinely use public opinion polls to keep track of what the people are thinking. An important question is the degree to which these polls should guide leaders in their actions. There are arguments for and against the use of polls as the basis for policy decisions.Polls can contribute to effective government by keeping political leaders from getting too far out of line with the public’s thinking. In a democratic society, the effectiveness of a public policy often dep. ends on the extent of its public support. When a policy is contrary to the public’s desires, people may choose to disregard or undermine it, thus making it counterproductive or inefficient. Further, when government pursues a course of action with which a large proportion of the public disagrees, it risks a loss of public confidence, which can have a negative effect on its ability to lead. The Reagan administration, flying high from 1981 to 1985 ,was brought low in 1986 by public reaction to news of its secret sales of weapons to Iran. The administration had not paid sufficient attention to polls that revealed the deep antagonism American still felt toward Iran be cause the Ayatollah Khomeini’s regime has held sixty-three American hostages in 1979 - 1981.However, leaders can also do a disservice to the public they represent by using poll results as a substitute for policy judgment. "Effective government", as Walter Lippmann wrote, "cannot be conducted by legislators and officials who, when a question is presented, ask themselves first and last not what is the truth and which is the right and necessary course, but what does the Gallup Poll say" During his presidential term, Jimmy Carter proposed five consecutive inflation-fighting programs, changing his plans with each shift in public sentiment without having invested the political capital necessary to get Congress and the country behind any of the efforts. The nation -- and Carter -- would probably have been better served by a steadfast commitment to a single course of action. The Carter example shows that for a leader（）
TEXT B1 GAZA CITY (CNN Thursday, May 13, 2004 Posted: 8:35 AM EDT (1235 GMT))-Two Israeli helicopter attacks Thursday in Gaza’s Rafah refugee camp have killed 10 people, according to Palestinian security and medical sources.2 The strikes followed Palestinian attacks on Israeli soldiers Tuesday and Wednesday that have claimed 11 soldiers’ lives. This week, violence in Gaza has claimed the lives at least 33 Palestinians as well as the 11 soldiers.3 The fighting comes as Israeli Prime Minister Ariel Sharon works on revising his plan to withdraw military personnel and Jewish settlements from Gaza and parts of the West Bank.4 Israel Defense Forces began the Gaza operation Monday night, saying the mission was aimed at destroying workshops used by Palestinian terrorists to construct Qassam rockets.5 Israeli helicopters first attacked the camp early in the day, killing seven and wounding six others, Palestinian security sources and medical sources said. A second strike was launched around 10:30 a.m. (3:30 a.m. ET), killing three and wounding eight others, the sources said.6 Wednesday night, an Israeli missile strike in Rafah killed seven Palestinians, Palestinian medical sources said. Israel Defense Forces said the Palestinians were targeted because they were trying to hide an explosive device. The strikes on the camp followed an attack that killed five Israeli soldiers traveling in a convoy near Rafah, according to the IDF.Note:7 Sharon’s withdrawal proposal - which would unilaterally withdraw Israeli military and settlements from Gaza and some regions, but not all, of the West Bank-has been praised by President Bush but was voted down in a Likud party referendum May 2.8 The prime minister has said the withdrawal is necessary because the Palestinian Authority had failed to rein in attacks on Israelis and because the diplomatic process is in a "frozen state."9 Palestinians have criticized Israel’s new plan, charging Sharon is attempting to circumvent the negotiations called for in the road map to Middle East peace, which is supported by the United States, the United Nations, the European Union and Russia. Why does Ariel Sharon propose unilateral withdrawal
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