找考题网-背景图
判断题

链表中的表头结点仅起到标识的作用。()

【参考答案】

错误
热门试题

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

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