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.

想问一下老师这题的定位思路是如何的，大后天就考了。答案是C，还想听一下D的话为什么不能选

想问下老师这题的思路。为什么B选项不对，对于比例是没办法说明坏的多还是少，需要一个说人数一样多来补充证明说motorized确实比non m多。为什么要D

想问下老师这题的思路是怎么的，assumption的题目应该怎么做，之前是老师的方法是说把assumption看成是一个argument的补充原因，好像在这里用不上？有点急

想问下老师这题的思路是怎么样的，快考试了有点急

想让老师理一下这篇阅读的文章结构还有解决下第4题

想问问唐塘老师这题思路是什么样的，我做的时候只get到了预算是由税的2%来的，然后一个公司现在由1%的这个城的雇佣员工组成（不知道对不对），还有想问下这题在考试里大概是什么水平的题目

想问下唐塘老师，这题我没看懂题目的意思，查了意思后说是调和xxxx，也不是很明白，然后我看说c讲了两个不同状态的婴儿，对于牛奶的吸收的不同，跟原文里呈现了两种婴儿的比较比较一样，就选了，这思路对么？答案是c

想请问下唐塘老师这题的思路是什么，感觉一点思路都没有

请王文静老师答疑

想问一下may老师，如果这一题把题干改成 a sequence of 6n conseuctive integers, 那是像这样分析吗。