Archaeology as a profession faces two major problems. First, it is the poorest of the poor. Only paltry sums are available for excavating and even less is available for publishing the results (5) and preserving the sites once excavated. Yet archaeologists deal with priceless objects every day. Second, there is the problem of illegal excavation, resulting in museum-quality pieces being sold to the highest bidder. (10) Iwould like to make an outrageous suggestion that would at one stroke provide funds for archaeology and reduce the amount of illegal digging. Iwould propose that scientific archaeological expeditions and governmental (15) authorities sell excavated artifacts on the open market. Such sales would provide substantial funds for the excavation and preservation of archaeological sites and the publication of results. At the same time, they would break the illegal (20) excavator's grip on the market, thereby decreasing the inducement to engage in illegal activities. You might object that professionals excavate to acquire knowledge, not money. Moreover, ancient artifacts are part of our global cultural heritage, (25) which should be available for all to appreciate, not sold to the highest bidder. Iagree. Sell nothing that has unique artistic merit or scientific value. But, you might reply, everything that comes out of the ground has scientific value. Here we part company. (30) Theoretically, you may be correct in claiming that every artifact has potential scientific value. Practically, you are wrong. I refer to the thousands of pottery vessels and ancient lamps that are essentially duplicates of (35) one another. In one small excavation in Cyprus, archaeologists recently uncovered 2,000 virtually indistinguishable small jugs in a single courtyard. Even precious royal seal impressions known as I'melekh handles have been found in abundance (40) —more than 4,000 examples so far. The basements of museums are simply not large enough to store the artifacts that are likely to be discovered in the future. There is not enough money even to catalog the finds; as a result, they 368 (45) cannot be found again and become as inaccessible as if they had never been discovered. Indeed, with the help of a computer, sold artifacts could be more accessible than are the pieces stored in bulging museum basements. Prior to sale, each could be (50) photographed and the list of the purchasers could be maintained on the computer. A purchaser could even be required to agree to return the piece if it should become needed for scientific purposes. It would be unrealistic to suggest that illegal (55) digging would stop if artifacts were sold on the open market. But the demand for the clandestine product would be substantially reduced. Who would want an unmarked pot when another was available whose provenance was known, and that was dated (60) stratigraphically by the professional archaeologist who excavated it? The primary purpose of the passage is to propose (A) an alternative to museum display of artifacts (B) a way to curb illegal digging while benefiting the archaeological profession (C) a wayto distinguish artifacts with scientific value from those that have no such value (D) the governmental regulation of archaeological sites (E) a new system for cataloging duplicate artifacts

请唐塘老师分析一下这道题，谢谢

想问下may老师什么时候变化率的计算公式 什么时候分母是被减数，什么时候是减数 像这题求时间的变化率分母是距离也就是被减数，但是对于其他年增长之类变化率的分母就是减数，想知道这个区别，谢谢老师

请文静老师解答：老师我读主旨大概总结为：各个政府开出优惠政策来吸引商家只会两败俱伤，这样不会创造更多的就业岗位，只会影响工作的布局。觉得B很核心的反应了文章主旨。因为从文章主旨上读出这样的行为各个政府都不受益只是影响工作布局罢了，那为什么政府还要重点关注E里竞争者开的条件呢？

老师您在讲课的时候把总数设为了a,将有副作用设为y,将有疗效设为了x,那通过条件（1）就可以知道有疗效为0.9a,没有疗效为0.1a,但是是怎么得出“没疗效有副作用”也为0.1a从而结合题设把y用a的式子表示的呢？感觉只能得出T这一栏里“没有疗效”的总数为0.1a哇

想问下may老师这题怎么做

想问下may老师怎么做

想问下may老师怎么做

[急] 这题七龙珠答案给的C，但是这里的contemporary只能是形容词或者名词，是不是不能直接接在名词后面用？如果这是个硬伤的话，E会不会更好一些呢？

[急] 请问May老师，这里通过连接下面圆的圆心，是不是是不是可以得到r跟b的直接关系，这样选A是不是就可以了呢？

当时老师讲的答案是A。statement 1 sufficient；statement 2 not sufficient。但是我现在不太理解了，觉得答案有些问题，能不能再详细的讲一下这道题怎么做？谢谢！