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.

这道题感觉A也好对

感觉C对因为可以降低运输成本

请翻译下however后这句话的意思

老师请教这个中文的题 答案是D，但我选的B，我认为条件1是不能判断出来的 第二张图片是当时老师上课讲的，请问蓝色的0.1a是怎么得出来的啊

老师，这个变体条件得出来的不是整除的式子，为啥能满足题干条件？谢谢

老师，这道题有点困惑，题目问的是最大公约数是多少，为什么直接选B，最大公约数是1？

这个题ACDE都错在哪里了呢？为什么选B呀

这题以前上学时就没见过，老师可帮忙讲下逻辑和原理么？

老师，这里的+63看不太懂，谢谢

请问这题里说一个化学反应等于一个数的平方，同时又等于另一个数的倒数，那这样，这个平方和这个倒数应该是相等的关系，为什么是一个相乘的关系然后再等于R呢？