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.

王文静老师，我这道题目选了E，因为读起来感觉：a third of them作为elephants的修饰语，有一个with比较顺口也比较符合一般修饰语的语法，能麻烦您解释一下吗

问王文静老师，结合未画线部分C答案相当于用and并列了两个That从句修饰robe，且句子结构，动词时态也没有什么错误，代词they也有明确的指代，请问老师是哪里有问题？

老师请问一下，A答案为什么错？estimated 用来修饰fragments，A和D的区别就是介词 at 和 to 的区别 固定搭配？查了例句 estimate at 是正确的使用 被估计在 。。几百万年以前这个语意放在此句里 我感觉是合理的。

请问一下老师，关于这道题，我是根据 either ..or..绝对的平行做对的，但是在and并列的两个谓语 date 和 were fashioned的这个部分有点困惑。为什么不是date and are fashioned 或者说 dated and were fashioned。我认为这里是在讲述一个客观事实：这个神像可以追朔到什么时期和由什么制成，应该是用一般现在时。were fashioed 是过去式的被动语态对吧？date and were fashioned感觉也不复合并列的要求。

问MAY老师，两个“项目”的会用TT图解决，请问MAY老师像这种三个“项目”的题应该怎么解决？

问MAY老师 我用TT图解决不了这个问题，麻烦老师帮我看一下是哪里出了问题。

May老师，这是博智模考题里面的一道数学题，不理解呢

May老师你好，这道题的第三小题我的解题思路是插空法，但是做出来答案不对，请老师找找我的问题。因为题目说两端不能有女生，那我就让3个女生插在男生当中，5个男生6个空位，但要去掉一头一尾两个空位，就是C4选3*A33*A55（剩下5个男生随便排），请问老师我的思路上哪里错了？

麻烦老师帮我看看我哪里做错了

阴影区的这句话，中间的那个gives，是跟着前面哪个词的? 是哪个词发出的gives动作? 谢谢