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.

请问郭老师 这是这次的寂静 请帮我分析一下下 如果问的是主旨 这主旨是啥？

请数学老师讲解思路 答案为1/30 谢谢老师

Although fruit can no longer grow once it is picked, it continues for some time to respire, taking in oxygen and giving off carbon dioxide, similar to the way human beings breathe. A similar to the way human beings breathe. B similarly to human beings who are breathing. C just like the breathing of human beings. D as human beings when breathing E just as human beings do when they breathe 老师，我在网上看到如下的答疑，similar to /like 只能就近修饰前面的n，所以ABC错误，这句话我不太理解，是说similar to和like在这里是修饰respire的吗？ 此外，还有个地方不理解，（like后面是不是应该+句子，similar to 后面+n ）才能表示比较呢？

请英吉老师回答~谢谢! 请老师看第五题，我当时看到C时是很想选C的，但是看完E后觉得E更直接，E说一些找不到停车位的车会在城里晃来晃去当等待游客时。我觉得原文建造停车场就能减少这个情况，挺像阐述逻辑链条的对立面的，请问我应该要怎样的的思路才能排除E呢？！谢谢~

请数学老师解答 勾股定理我已经忘的差不多了 这题怎么判断

请郭老师解答 另外b为什么是错的

请王文静老师回答，谢谢！这题我是这样下手的，AC分一组，强调advocate这个动作; BDE分一组重点倾向去修饰reformers这些人，所以我哦才留了BD. 请问老师这样想对吗？你在直播课里说advocate后面跟名词，我觉得这个算是比较细的语法点，请问advocate后加名词这个语法点是不会错的么？谢谢~

请王文静老师回答～谢谢！ 这题我不知道从何下手，感觉题目是说把用油的车换成用天然气的。所以，觉得前面应该要有“用油”这个表达和未划线部分的run on clearner-burning natural gas对应，所以我觉得BE比较对应。但答案是A..麻烦老师解答一下下手点！

思路： 能排除ACD，留下BE。 我一开始选了B因为觉得语义最通顺：本地猫起源于非洲野猫 4000年之前，which一个前所未有的短时间给本地猫进化以及 （4000年）是足够的为身体变化。 E 后面用的是一个同位语 divergence 指代主干的事情 这点我能接受 这个one 指的是谁啊？ 我一开始以为指的是时间 然后看Ron说 指代的是divergence 我就不能理解了。 网上搜到的解释给的答案是E。求老师讲解BE。 谢谢

19年OG这题貌似还没录入你们系统。 想问老师排除了ABC,当时在DE之间徘徊。。。后来选错了，但是D怎么不如E呢?