电气管线设备安装工程最低保修期限是（   ）年。

马克思主义认为，阶级产生的直接原因是：（          ）。

教学《六国论》教师为了帮助学生理解秦灭六国的历史背景，展示了“秦灭六国形势图”，下列对教师行为的分析，合适的是（  ）。

房屋建筑工程提取企业安全生产费用的提取标准为（  ）。

Passage 1    Results showed that at least a tenth of the Harvard first-year undergraduates polled admitted to having cheated on an exam prior to starting at the university, while almost half admitted to cheating on their homework. An anonymous survey by Harvard's newspaper has revealed a surprising pattern of academic dishonesty among studertts entering the US universities.    The survey by The Harvard Crimson was emailed to the incoming first year undergraduates; 1,600 students responded. Results showed that at least a tenth of the students polled admitted to having cheated on an exam prior to starting at the university, while almost half admitted to cheating on their homework.    Athletes were apparently the most prone to cheating. 20 percent of students who played a university sport admitted to cheating on an exam compared to 9 percent of students who did not. The survey also revealed that men were not only more likely to cheat but were also more likely to admit to it.    The results, compared to a previous survey done on the class of 2013, suggested that cheating may be becoming more commonplace. Of the outgoing seniors only 7 percent admitted to cheating in an exam and another 7 percent said they had been dishonest on a take-home test. 32 percent of the seniors said they had cheated on homework during their undergraduate years.    The surveys come in the wake of a cheating scandal at the university which saw 120 students investigated for sharing answers on an exam in 2012. One recent graduate stated: "Cheating was commonplace when I was at Harvard, especially with students in their first year or two. I would say as many as 60 per cent of students took notes into some exams. No one really cared the faculty, well some of them at least, seemed to recognize and yet ignore the problem."    In an email to NBC News, Jeff Neal, a Harvard representative, explained that a committee, made up of faculty, staff and students had been established to tackle cheating, which "is a national problem in American education".    He added: "While the vast majority of Harvard and other students do their work honestly, beginning this year Harvard College has implemented a new, more robust strategy of communicating with all students, particularly first-year students, about the importance-and the ways to achieve- academic integrity."    In a rebuff to critics who say university has become little more than an expensive party, 84 per cent of the responding undergraduates fully expected to prioritize their academics over extracurricular activities, sport, employment and their social lives. Not a single student put academics at the bottom of their list. Not content with confining themselves to their degree subject, 59 percent of incoming students expressed a desire to pursue a secondary field of study, and 36 percent hoped to learn a language.
What does the author mean by saying "The results,... suggested that cheating may be becoming more commonplace." (Para. 4)?

送气音发音时声带都不参与活动。[北京语言大学]

五脏共同的生理功能是

味爽公司是一家老牌方便面企业，其市场份额曾长期占据中国大陆市场的1/3。近年来，一些中小食品企业加速涌入方便面市场。为了维持市场地位，味爽公司不断改进生产流程，通过降低生产成本，在市场中获得了理想的竞争优势。味爽公司的上述行为属于公司的（　　）。

《逍遥游》是《庄子》的首篇，想象丰富，文字绮丽，在思想和艺术上都可作为全书的代表。文中提到了一条硕大无比的鱼和一只垂翼蔽日的鸟，它们是 ( )。

某金属冶炼企业，新增轧钢生产线，需重新抽调人员进入新的生产线，其中，王某由转炉生产车间岗位调入，张某是新入职的人员，李某是5个月前从本企业离岗后重新上岗，关于安全教育培训的说法，正确的是（   ）。

重症肌无力的自身抗原是