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．special
B．vital
C．strict
D．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。()