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.

王文静老师您好！这道题目我看不出考点，我做题的思路一个是conclude后面跟by还是with，没想到可以to。然后impose不知道是哪个形式比较好？求老师指教

王文静老师您好，这道题目我做题的时候看到了and想到了可能是考平行，但是我记得之前做题好像and后面再加that的话句子算redudant，that..and that这种结构是固定结构吗？求老师指教，谢谢

请郭老师解答 谢谢

请郭老师解答 谢谢

请郭老师解答 谢谢

请郭老师解答 谢谢

请郭老师解答 谢谢

请郭老师解答 谢谢

请郭老师解答 谢谢

麻烦老师帮我解决一下这一题，看ABCD这个走向，它主要是想进一步说明一下w是怎么样的。A主要是错在where 不能修饰society CD主要错在就近修饰W的话，主谓不一致。E答案，犹豫了一下，就是living按照语法规则修饰到yellow也是合理的，所以E被排除掉的理由是从and这个并列上来看，是因为it 没有能指代的名词吗？因为前面不管是YJ 还是SPECIES 或 w都是复数的形式