文章：According to many analysts, labor-management relations in the United States are undergoing a fundamental change: traditional adversarialism is giving way to a new cooperative relationship between the two sides and even to concessions from labor. These analysts say the twin shocks of nonunion competition in this country and low-cost, high-quality imports from abroad are forcing unions to look more favorably at a variety of management demands: the need for wage restraint and reduced benefits as well as the abolition of "rigid" work rules, seniority rights, and job classifications. Sophisticated proponents of these new developments cast their observations in a prolabor light. n return for their concessions, they point out, some unions have bargained for profit sharing, retraining rights, and job--security guarantees. Unions can also trade concessions for more say on the shop floor, where techniques such as quality circles and quality-of-work­ life programs promise workers greater control over their own jobs. Unions may even win a voice in investment and pricing strategy, plant location, and other major corporate policy decisions previously reserved to management. Opponents of these concessions from labor argue that such concessions do not save jobs, but either prolong the agony of dying plants or finance the plant relocations that employers had intended anyway. Companies make investment decisions to fit their strategic plans and their profit objectives, opponents point out, and labor costs are usually just a small factor in the equation. Moreover, unrestrained by either loyalty to their work force or political or legislative constraints on their mobility, the companies eventually cut and run, concessions or no concessions. Wage-related concessions have come under particular attack, since opponents believe that high union wages underlay much of the success of United States industry in this century. They point out that a long-standing principle, shared by both management and labor, has been that workers should earn wages that give them the income they need to buy what they make. Moreover, high wages have given workers the buying power to propel the economy forward. f proposals for pay cuts, two-tier wage systems, and subminimum wages for young workers continue to gain credence, opponents believe the U.S. social structure will move toward that of a less-developed nation: a small group of wealthy investors, a sizable but still minority bloc of elite professionals and highly skilled employees, and a huge mass of marginal workers and unskilled laborers. Further, they argue that if unions willingly engage in concession bargaining on the false grounds that labor costs are the source of a company's problems, unions will find themselves competing with Third World pay levels-a competition they cannot win. 想请问郭老师，这题opponents观点是在第三段，但是原文和选项要怎么对照呢...怎么从观点看出态度？

These days, publishers in Ramistan of glossy Western-style magazines rarely need to worry about interference from the government — the magazines’ content promotes consumption, and convincing Ramistan’s emerging middle class to spend their money is a key component of domestic policy. 想问选项A的and convincing是修饰谁的呢？修饰content的话为什么可以在前面加and？ 选项C为什么语法不正确呢？

plums are 75% water. prunes are 15% water. how much water must be evaporated for x kg of prunes? 这是我今天考场上的题，好像做错了。我乱选了（85x/15） 其他选项有各种 25x/85，15x/75什么的。应该怎么做？

一辆车，车轮上有一点离圆心 d cm，车子前进 D cm，问该点距离/车子前进的距离？ 1. d等于一个值 2. D等于一个值

Shoppers at Retailer R who purchased substitute items from other manufacturers on DayI paid a total amount that was approximately 78 of the total shoppers would have paid had each of them been able to purchase ProductXon Day 1. “was 和 would have paid ”都在一个从句里，怎末会有两个谓语动词？“had each of them been able to...”这部分是跟谁啊？看不懂

On his drive to work, Leo listens to one of three radio stations, A, B, or C. He first turns to A. If A is playing a song he likes, he listens to it; if not, he turns to B. If B is playing a song he likes, he listens to it; if not, he turns to C. If C is playing a song he likes, he listens to it; if not, he turns off the radio. For each station, the probability is 0.30 that at any given moment the station is playing a song Leo likes. On his drive to work, what is the probability that Leo will hear a song he likes? 这个题目的0.3为什末代指在A station 播放到了自己喜欢的？不太理解0.3到底指的是甚麽

提问叶老师，这个题我不太理解为什么appear要用单数？ D选项，what 指什么？from what 这个倒装正常语序应该怎么写？

等腰直角三角形的周长为：16+16√2 ；问斜边的长度 等腰直角三角形的非直角边一样长：那设为x 所以斜边就为（根据勾股定理）x√2 所以周长：x+x+√2 x=16+16√2 2x+√2 x=16+16√2 X=8√2 斜边就等于：16 问题：X=8√2 是怎么算出来的？

为什么算到这一步(3^2-2^2)(3^2+2^2)(3^4+2^4)就能直接算答案了（答案:5x13x97），难道有4次方的地方不继续化简吗？我怎么知道要把公式简化到哪一步？

老师好 我这道题的方法就是解二次方程，只有唯一正解才能证明是充分的。（我发现很多应用题都是这样）但是我发现解二次方程很浪费时间，考试的时候可能没那么充分的时间，怎么办呢？这道题还有更好的方法吗？谢谢老师