老师您好能否帮我讲解下下面这个文章考试时该如何读，我读完这种文章压根不知道在说什么，只知道在讲ocean basin形成机制的几种理论。No very satisfactory account of the mechanism that caused the formation of the ocean basins has yet been given. The traditional view supposes that the upper mantle of the earth behaves as a liquid when it is subjected to small forces for long periods and that differences in temperature under oceans and continents are sufficient to produce convection in the mantle of the earth with rising convection currents under the mid-ocean ridges and sinking currents under the continents. Theoretically, this convection would carry the continental plates along as though they were on a conveyor belt (conveyor belt: n. 传送带) and would provide the forces needed to produce the split that occurs along the ridge. This view may be correct: it has the advantage that the currents are driven by temperature differences that themselves depend on the position of the continents. Such a back-coupling, in which the position of the moving plate has an impact on the forces that move it, could produce complicated and varying motions. On the other hand, the theory is implausible because convection does not normally occur along lines, and it certainly does not occur along lines broken by frequent offsets (an abrupt bend in an object by which one part is turned aside out of line) or changes in direction, as the ridge is. Also it is difficult to see how the theory applies to the plate between the Mid-Atlantic Ridge and the ridge in the Indian Ocean. This plate is growing on both sides, and since there is no intermediate trench, the two ridges must be moving apart. It would be odd if the rising convection currents kept exact pace with them. An alternative theory is that the sinking part of the plate, which is denser than the hotter surrounding mantle, pulls the rest of the plate after it. Again it is difficult to see how this applies to the ridge in the South Atlantic, where neither the African nor the American plate has a sinking part. Another possibility is that the sinking plate cools the neighboring mantle and produces convection currents that move the plates. This last theory is attractive because it gives some hope of explaining the enclosed seas, such as the Sea of Japan. These seas have a typical oceanic floor, except that the floor is overlaid by several kilometers of sediment. Their floors have probably been sinking for long periods. It seems possible that a sinking current of cooled mantle material on the upper side of the plate might be the cause of such deep basins. The enclosed seas are an important feature of the earth’s surface, and seriously require explanation because, in addition to the enclosed seas that are developing at present behind island arcs, there are a number of older ones of possibly similar origin, such as the Gulf of Mexico, the Black Sea, and perhaps the North Sea.

麻烦金老师回答，这题because 后面说明原因，原因还比较长，一句完整的话比较好，所以我首先考虑 A C D 然后在对比差异点上 关于到底是 especially 还是 specially ，还有削弱能力这个表达上实在选不出ACD 哪个更好 不是特别清晰

麻烦金老师回答，这题我读到的大概语意是M这类人居住在什么地方，后面的划线部分应该是紧接着修饰的，然后就没有下手点了，想听听老师的思路。

麻烦金老师帮我辨析一下BC 我能大概GET这题是在考比较考点，就是少数名族毕业生比其它类型的毕业生的四倍，我比较迷惑的点是C答案里面的这个as as ，这个不是同级比较么？顺着读，少数名族毕业生接近四倍和其它毕业生一样，感觉不通顺，相反我觉得B答案少数名族毕业生比其它类型的多四倍，读起来顺一点。我对比较级的这几个词理解的不是很透彻，麻烦老师帮忙辨析一下。

数学老师您好，这道是前两天更新的jj题目，因为我没有学过国内的高中数学，所以我不太能够理解答案里面所说的：K>0,可以判断出抛物线的极植点在x的上方？我想如果a（x-b)^2+k一直小于0，那这个抛物线就不会和x轴有交点

老师 我在想这道题是不是可以选A，我想的根据条件一，先假设中间大小的角和x相等，所以得出：3x+10+x+x=180，可以算出x和中间大小的角相等的情况下等于34，然而34应该是x最大的可能性，所以x一定小于34，锁体条件一单独成立。老师我不知道我的解题思路对不对，求指教

May老师，这道鸡精题目我算出来是A，确定答案对吗？

这题完全不懂 麻烦数学老师解答一下 谢谢

请数学老师讲解 一下图片题 另外我之前问的一道题 您没有解答清楚b选项 A certain list consists of 3 different numbers. Does the median of the 3 numbers equal the average (arithmetic mean) of the 3 numbers? (1)The range of the 3 numbers is equal to twice the difference between the greatest number and the median. (2)The sum of the 3 numbers is equal to 3 times one of the numbers.

麻烦金老师帮我解答一下这道语法题，首先我特别迷惑的点是关于这个which的指代，麻烦老师帮我辨析一下，之前老师说which不能指代整句话，要在前句有与之对应的名词，如果出现多个名词which的出现就会犯指代不清楚的错误，就是说前句只有一个名词不管是单复数都可以用which准确指代上是这个意思吗？刚开始做这题的时候一眼扫过去有results 和 company’s cost-cutting measures， profits 三个复数名词就排除掉了了ABC，因为我觉得which 在这里会犯指代不明的错误。事后看了正确答案，是因为of the company’s cost-cutting measures 只是results 的修饰语 ？那也还有profits 呢，从语意出发我觉得没毛病，但是这个which在这里有点指代不明。相反我觉得我错选的D答案前句的语意是“公司削减成本措施的结果在其利润中很明显”with。。（伴随）这这样一个结果，语意很通顺，也没有什么歧义，麻烦老师帮我辨析一下这几个点

麻烦金老师帮我解答一下这道语法题，老师我看到assumed 这个词就觉得后面应该接一个虚拟语气，我这样判断会不会太武断？我直接就排除掉ACD了 。还有就是纠结了一下这个代词的问题，这个IT指代到stategic ？, Morocco？关于这个their 犹豫了一下这个顺着读是摩洛哥对法国人感兴趣，但是看这个代词their 和 they 应该是法国人对摩洛哥感兴趣