在任何情况下，归并排序都比直接插入排序快。()

单项选择题购并日需要编制合并()。

单项选择题对于内部交易所形成的固定资产，在到期清理期间进行抵销处理时，只需要抵销的内容是()。

判断题链表中的表头结点仅起到标识的作用。()

未分类题As Valentines Day approaches, many single people begin to feel a little sorry for themselves. On a day【C1】______by couples, this can lead to feelings of【C2】______and loneliness, say researchers.【C3】______, dont worry—they say it could【C4】______be good for you. 'On the【C5】______of everyday life, it is understandable how something as personally【C6】______as loneliness could be regarded as a plague on human existence,' John Cacioppoat and his fellow researchers at the University of Chicago write in the journal Cognition & Emotion. 'Research【C7】______the past decade suggests a very different view of loneliness than suggested by personal experience, one in which loneliness【C8】______a variety of adaptive functions in【C9】______habitats.' 'Although it may feel like loneliness has no redeeming【C10】______, it promotes behavior. change to increase the likelihood of the survival of ones genes. The pain of loneliness served to【C11】______us to renew the connections we needed to ensure survival and to promote social trust, co-hesiveness, and collective action.' However, there was also bad news—researchers found the lonely are viewed more negatively in terms of their psychosocial functioning and attractiveness. 'In a social environment non-lonely people form. a negative impression【C12】______lonely people, which then affects their behavior. and【C13】______the lonely individuals perceived isolated existence,' the researchers wrote. '【C14】______, individuals rated opposite-gender partners who they expected to be lonely as less sociable, and【C15】______towards them in a less sociable【C16】______than they did toward partners they expected not to be-lonely.' The team even say loneliness could be behind many sports fans decision to【C17】______their team. 'The emergence of a collective connectedness factor underlying loneliness, therefore, suggests that we may have evolved the capacity for and motivation to form. relationships not only with other individuals but also with groups (e.g., a Chicago Cubs or Boston Red Sox fan), with the【C18】______being the promotion of co-operation in【C19】______conditions (e.g., competition, warfare). The identification with and investments in the group, in turn, may increase the likelihood of the continuity of the group, its members, and their individual genetic【C20】______.'【C1】A．arrangedB．controlledC．dominatedD．saved

判断题家长工作不仅包括幼儿园对幼儿家庭教育的各种输入，也包括幼儿家庭对幼儿园教育的各种投入。这是双向服务的过程，因而其内容也包括引导家长参与到幼儿园的教育中。()

未分类题Just seven years ago, the Texas Legislature prescribed that all high schoolers must pass two math courses and geometry to graduate. This summer, the state reversed course, easing its【C1】______math, science, and social-studies requirements to【C2】______class time for job training. Texas legislators want to create a more【C3】______system that helps students who arent headed to four-year colleges enter the workforce. But that【C4】______carries some risks.【C5】______its true that not all students will go on to college, pulling back on college preparatory coursework has to be【C6】______carefully in a state like Texas, with its hundreds of thousands of low-income and【C7】______students. Theyre the students who would benefit from college the most. New laws in Texas, as well as in Florida, de-emphasize the math class required for【C8】______to four-year colleges. Knowledge of these subjects is considered an indicator of college readiness【C9】______the Common Core standards, which have been【C10】______by 45 states, including Florida. More than half of public-school students in both states are nonwhite and from low-income families. Its particularly【C11】______that these Hispanic and African-American students leave high school qualified to further their e-ducation—【C12】______they dont plan on doing so right away. A college【C13】______is the most important driver of social mobility. By 2020, 65 percent of all jobs will require some kind of postsecondary education according to surveys. 【C14】______speaking, Texass earlier college-prep course-work recommendations didnt fit reality.【C15】______the high bar, only about half of the states high school graduates immediately headed off to college of any kind. 'We wanted to give students and parents more flexibility, to not only be college-prepared—which I think were doing a pretty good job of—but perhaps to【C16】______that preparation to folks who may not be going to college,' Representative Jimmie Don Aycock, who【C17】______the Texas Houses Public Education Committee, says of the revision. The goal isnt to dumb down the curriculum, he says, but to let kids【C18】______a path that might not have been【C19】______to them before. The states educational system still rewards schools when students【C20】______college readiness.【C1】A．specialB．vitalC．strictD．absurd

单项选择题当总产量达到最大时( ) A.边际产量为正 B.边际产量为负 C.边际产量为零D.边际产量与平均产量相等

判断题在正态分布中，标准差反应了正态曲线的陡峭程度。()

未分类题Its difficult to imagine a world without antibiotics. They cure diseases that killed our ancestors in crowds, and enable any number of medical procedures and treatments that we now take for granted. Yet in 1945, while accepting a Nobel Prize for【C1】______penicillin, Alexander Fleming【C2】______a future in which antibiotics had been used with【C3】______and bacteria had grown resistant to them. Today, this future is approaching. Speaking to reporters last fall, Tom Frieden, the director of the Centers for Disease Control and Prevention,【C4】______a similar alarm: 'If were not【C5】______, we will soon be in a post-antibiotic era. In fact, for some patients and some bacteria, we are already there.' The problem【C6】______overuse. Recent research by doctors at Harvard and Womens Hospital found that the vast majority of antibiotics【C7】______for sore throats and acute bronchitis—an illness almost always caused by a【C8】______, not bacteria—are useless. Up to 80 percent of all antibiotics used in the U.S. each year,【C9】______, are given to animals. Antibiotics are the lifeline of the meat and poultry industries, which have used drugs to domestic animals as a means of【C10】______growth and preventing illnesses caused by overcrowding and poor conditions. An increasing number of bacterial【C11】______have taken the opportunity to evolve【C12】______the reach of antibiotics. The CDCs 2013 threat report listed 17 antibiotic-resistant microorganisms that directly cause at least 23,000 deaths each year in the U.S.【C13】______Globally, drug-resistant pneumonia is an ever-increasing threat. Reported cases have【C14】______over the past nine years, killing an estimated 170,000 people last year. Although anti-bacterial resistance can be slowed, it is【C15】______. As a result, medicine companies have found antibiotics to be less【C16】______investments than drugs for chronic illnesses, which can be used over the long term. If we dont【C17】______our use of existing antibiotics and commit to developing new ones, the risks are not just medical, but【C18】______. The CDC estimates that, in the United States, antibiotic resistance already costs $20 billion in【C19】______health-care spend and $35 billion in lost productivity【C20】______.【C1】A．dosingB．discoveringC．providingD．delivering

判断题简单随机抽样适用于总体数目多且个体差异程度较小的情况。()

判断题当p=0.6时，二项分布是正态的。()

未分类题This passage mainly tells us thatA．parents' love for their children is great.B．it is dangerous for parents to reunite with their children in a disaster.C．we should develop reasonable plans for disasters.D．the U. S. government has been well prepared for disasters.

判断题两个总体的分布形态，不会影响两独立样本t检验。()

判断题I类错误可能的原因是由于样本数据自身的误导性。()

未分类题According to the federal official, the decline of application for citizenship was caused byA．the increase of citizenship fee.B．unstable economy.C．various reasons.D．the upcoming revisions to the U. S. citizen test.