陆旭老师，麻烦帮忙看下这道题目的B和E选项，我选了E。这道题目我理了一下: R的人民医疗保障的普及程度比T地高 ,R地大多数病的死亡率比T第低，但是R地男性中死于PC的比率要远远高于T地。问矛盾产生的原因。我就猜测答案一定是指出两个地方的不同之处，才能导致这种情况产生。那么E里面只讲了R地得病的男性很多人是因为没有好好利用这个医疗才死的，的确只说了R地，就是自己和自己比，如果非得说正是因为他们没有好好利用才导致T地的人死得少，那么就过度推理了。我后来想了下，如果R地100个男性里面99个得了这个PC，98个没有好好利用死掉了，那么T地100个男性里面99个得了这个PC，98个人因为没有医疗保障死掉了，这根本没法比。但问题是，B不是也只说了T地吗，T地很多男性无法活到得这个病的年龄，自然男性中死亡率就降低了，但是我怎么知道R地的男性能活到那个时候呢，里面又没有明确指出T与R的对比关系，这是不是也存在过度推理？同时，第一句话在我做题的时候充当什么角色呢，不是premise吗？

请问老师这道鸡精题解题思路

我想问第49题，第二个条件，由公示得出f（a）*f（b）=10a方✖️10b方=100a方✖️b方，所以只能a方✖️b方为0，所以结果为0？

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？

请问may老师 13) In triangle ABC, point X  is the midpoint of side AC  and point Y  is the midpoint of side BC . If point R  is the midpoint of line segment XC  and if point S  is the midpoint of line segment YC , what is the area of triangular region RCS  ? (1)   The area of triangular region ABX  is 32. (2)   The length of one of the altitudes of triangle ABC  is 8. 答案；A

求问此题：(3!+4!+5!)/(4!+5!+6!) =?

２１）Is │x - y│>│x - z│?（绝对值比大小思路？） (1)   │y│>│z│ (2)     x < 0 E 请问may老师

DS：求1/a+3/b等于多少？ 条件1：a和b的最大公因数是6 条件2：a和b的最小公倍数是120

请问老师，这题选项应该是A吧？谢谢！

一个立方体塑料盒内腔长宽高分别是x、y、zcm，塑料厚度是1，问塑料体积。谢谢老师解答！

求问此题：DS：K为正整数，问是否有超过3个的prime factor？ 条件1：K>30 条件2：K<20 很多人选A；我觉得应该选D;∵Prime Factors有：2/3/5/7……把最小的不同质数相乘=2*3*5=30；那么由条件一可得：K必然有超过三个以上的prime factors；有条件二可得K的不同质数必然只有2和3.所以俩条件都充分，请老师解答。谢谢！