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.

请问老师这道题怎么做，谢谢！

请问徐老师这道题怎么列式呀？我卡在different那里了

请徐老师用您的方法讲解一下这道题，谢谢！

请教一下May老师，圈起来的地方有点转不过弯，请解答，谢谢！

有点不知道怎么算

这道题B我选了C，B我算的不能确定s3一定在呀，请老师点拨！

这个错选了D，麻烦老师讲解一下关于年利率的知识点吧，有点糊。谢谢老师！

老师好，这道题正确答案是A。我通过这里的第一个and并列两个句子只留下了AD，但AD不太会排，麻烦老师讲一下，谢谢！

作文，感觉找不出其他错了，请老师看看，感谢！

我列了一下式子感觉第二年的销量和价格都能用第一年的多少倍来表示呀，难道是因为没有说是不是沙发的单价全都相等？