(D) An increase in the tendency of blood to pool at the snake\'s head when the snake is tilted at various angles with its head down
An increase in the amount of effort required to distribute blood to and from the snake\'s tail
问的是个细节题,蛇的心脏接近脑袋有什么缺点,考的肯定是文章最后一段的内容,但这段开头讲的是心脏接近脑袋有什么好处,你问的是缺点,在这段however这句方向开始发生变化,我们来读一下这句.说有一种 arboreal snakes心脏离脑袋近,但是这个特点使得血液从尾巴流到脑子走的距离更长,我们来看选项
A 蛇控制血液流到脑子的效率下降,没提,杀
B 数量少了,更没提,杀
C 血压下降,没提,杀
D 没提,杀
E 把血液送到尾巴并且从尾巴再送出更费劲了,有点,留着
Question #28. 147-09 (22542-!-item-!-188;#058000147-09)
In the passage, the author is primarily concerned with doing which of the following?
(A) Explaining adaptations that enable the terrestrial snake to cope with the effects of gravitational pressure on its circulatory system
(B) Comparing the circulatory system of the sea snake with that of the terrestrial snake
(C) Explaining why the circulatory system of the terrestrial snake is different from that of the sea snake
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