这道题正确答案是 B， 我一直觉得是D, 不是特别明白 B 答案为什么 说as effectively as sea snakes can? One such adaptation is the closer proximity of the terrestrial snake's heart to its head, which helps to ensure circulation to the brain, regardless of the snake's orientation in space. The heart of sea snakes can be located near the middle of the body, a position that minimizes the work entailed in circulating blood to both extremities. In arboreal snakes, however, which dwell in trees and often assume a vertical posture, the average distance from the heart to the head can be as little as 15 percent of overall body length. Such a location requires that blood circulated to the tail of the snake travel a greater distance back to the heart, a problem solved by another adaptation. 20. It can be inferred from the passage that which of the following is true of species of terrestrial snakes that often need to assume a vertical posture? (A) They are more likely to be susceptible to circulatory failure in vertical postures than are sea snakes. (B) Their hearts are less likely to be located at the midpoint of their bodies than is the case with sea snakes. (c) they cannot counteract the pooling of blood in lower regions of their bodies as effectively as sea snakes can. (d) the blood pressure at their midpoint decreases significantly when they are titled with their heads up.

语法题目，请指定王文静老师回答。 问题语法讲义-修饰-第十题-Psychiatrist题目，我感觉选项A.B都是一样的意思，而且2个选项都没有问题，不知道该如何取舍。谢谢

老师，这道题怎么解的？我自己的理解是，速度慢的机器有1到3台，把每台多出来的1小时加在一起除4，求得的平均值就是小数点后的数字。所以求的平均值最小是0.25不可能是0.2因此选项A，7.2是不可能的。但是不知道这道题是不是这么理解的。

老师，这题答案是D，但我觉得是C。题中说大于10小于100的整数，应该是89个，掉到过来98+9，个位数是7

20题我计算是95页，但是答案是B，99页，不知道怎么算出来的。

老师25题答案给的是30%.可是我怎么算都应该是40%呢？我算错了吗？应该怎么算？

老师这道题没明白是什么意思

老师，第12题我没明白是什么意思

这个是Tina 老师在语法课上讲的一道题，不知道为什么搜不出来。想问一下，正确答案B 选项中的begun为什么不是过去分词引导的状语从句修饰the autographed quilt? Tina 老师在课上讲的是：begun是就近修饰名词fad的，我就很迷茫。我一直记得您讲过过去分词和现在分词作状语是修饰不到SVO 的O 上的，那这个为什么例外呢?谢谢您!

One day 340 million shares of stocks were sold. Among them 3/4 are domestic stocks. Among all the stocks sold 3/5 belong to institutional transactions. What is the minimum number of domestic shares could be traded by private parties on that day? 想问下这道题怎么画图解决？

请陆旭老师回答第25题，没有思路