更多“美国的（）是对公开市场证券进行评级的第一人。”相关的问题
阅读下面这首诗，然后回答问题。炉中煤 ——眷恋祖国的情绪啊，我年青的女郎! 我不辜负你的殷勤， 你也不要辜负我的思量。 我为我心爱的人儿 燃到了这般模样! 啊，我年青的女郎! 你该知道了我的前身 你该不嫌我黑奴卤莽 要我这黑奴的胸中， 才有火一样的心肠。 啊，我年青的女郎! 我想我的前身， 原本是有用的栋梁， 我活埋在地底多年， 到今朝总得重见天光。 啊，我年青的女郎! 我自从重见天光， 我常常思念我的故乡， 我为我心爱的人儿 燃到了这般模样!
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A . 先把上级介绍给下级B . 先把晚辈介绍给长辈C . 先把客人介绍给主人D . 先把早到的客人介绍给晚到的客人
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如果∫f（x）dx=3x+c，那么∫xf（5-x2）dx等于：（）https://assets.asklib.com/psource/201607161731484290.jpg
A . A
B . B
C . C
D . D
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女性，52岁。患急性化脓性胆管炎，面色苍白，肢体湿冷，脉搏144次/分，血压11/9.33kPa（86/70mmHg），经大量快速输液后血压和脉搏无改善，测中心静脉压2.06kPa（21cmH2O）。血pH7.30。应采取的有效措施是（）。
A . A.继续快速补液
B . 用血管收缩剂
C . 给强心药
D . 纠正酸中毒
E . 加大抗生素用量
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斑蝥炮制后，可
A．改变药性
B．缓和药性
C．降低毒性
D．矫臭矫味
E．增强疗效
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影响供给量的主要因素不包括( )。
A．产品价格
B．产品成本
C．生产者对价格的预期
D．消费者对未来价格的预测
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在认知领域的教学目标分类中，第二层级的主成分以（）为主要标志。
A.记忆因素 B.理解因素 C.判断因素 D.应用因素
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Text 2 Good teachers matter. This may seem obvious to anyone who has a child in school or, for that matter, to anyone who has been a child in school. For a long time, though, researchers couldn’t actually prove that teaching talent was important. But new research finally shows that teacher quality is a close cousin to student achievement: A great teacher can cram one-and-a-half grades’ worth of learning into a single year, while laggards are lucky to accomplish half that much. Yet, while we know now that better teachers are critical, flaws in the way that administrators select and retain them mean that schools don’t always hire the best. Failing to recognize the qualities that make teachers truly effective and to construct incentives to attract and retain more of these top performers has serious consequences. Higher salaries draw more weak as well as strong applicants into teaching — applicants the current hiring system can’t adequately screen. Unless administrators have incentives to hire the best teachers available, it’s pointless to give them a larger group to choose from. Study after study has shown that teachers with master’s degrees are no better than those without. Job experience does matter, but only for the first few years, according to research by Hoover Institution’s Eric A. Hanushek. A teacher with 15 years of experience is no more effective, on average, than a teacher with five years of experience, but which one do you think is paid more This toxic combination of rigid pay and steep rewards for seniority causes average quality to decline rather than increase as teacher groups get older. Top performers often leave the field early for industries that reward their excellence. Mediocre teachers, on the other hand, are soon overcompensated by seniority pay. And because they are paid more than their skills command elsewhere, these less-capable pedagogues settle in to provide many years-of ineffectual instruction. So how can we separate the wheat from the chaff in the teaching profession To make American schools competitive, we must rethink seniority pay, the value of master’s degrees, and the notion that a teacher can teach everything equally well — especially math and science — without appropriate preparation in the subject. Our current education system is unlikely to accomplish this dramatic rethinking. Imagine, for a moment, that American cars had been free in recent decades, while Toyotas and Hondas sold at full price. We’d probably be driving Falcons and Corvairs today. Free public education suffers from a lack of competition in just this way. So while industries from aerospace to drugs have transformed themselves in order to compete, public schooling has stagnated. School choice could spark the kind of reformation this industry needs by motivating administrators to hire the best and adopt new strategies to keep top teachers in the classroom. The lesson that good teachers matter should be taught, not as a theory, but as a practice.
A．distinguish better teachers from less capable ones.B．differentiate young teachers from old ones.C．tell the essential qualities of good teaching.D．reevaluate the role of senior teachers.
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根据皮亚杰划分的儿童发展阶段，儿童的“自我中心化”出现在（）
A.感知运动阶段
B.前运算阶段
C.具体运算阶段
D.形式运算阶段
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1992年某市房地产价格迅速提高，引起房地产需求的大幅度增长，而1996年该市房地产价格大幅度下降，却没有引起房地产需求的较大提高，说明房地产需求价格弹性系数与价格水平有关。（）
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会计报表附注应当包括以下（）等内容。
A.中信银行基本情况 B.会计报表的编制基础 C.合规声明 D.重要会计政策和会计估计说明
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盖篷布的敞车必须在发站加盖篷布绳网，使用篷布绳卡，篷布绳网、绳卡由承运人免费提供（）
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为什么不把氢键归为化学键的一类？氢键不是共价键，为什么它也有方向性和饱和性？
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