首页
登录
职称英语
An adult giraffe’s head is about six feet above its heart. This means that to 【C
An adult giraffe’s head is about six feet above its heart. This means that to 【C
游客
2023-07-17
65
管理
问题
An adult giraffe’s head is about six feet above its heart. This means that to 【C1】______ enough blood up to the brain the circulatory 【C2】______ must be strong enough to keep the blood at very high pressure.
Biologists have known for some time that giraffes solve this problem by having 【C3】______ high blood pressure, about 【C4】______ that of human beings. But an international team of biologists began to 【C5】______ about this. If giraffes have such high blood pressure, they should have a 【C6】______ problem with swelling in their legs and feet. Why don’t giraffes have swollen feet?
Giraffes should have 【C7】______ problem, too. Every time they bend heads 【C8】______ to drink, the blood should 【C9】______ to their heads and have a hard time 【C10】______ back up (when the head is down) to the heart. How come giraffes don’t black out when they drink?
The answer to the 【C11】______ feet problem, the researchers found, is that giraffes have 【C12】______ the researchers call a "natural anti-gravity suit". It 【C13】______ out that the skin and other 【C14】______ in their legs and feet are 【C15】______ stiffer and tougher than those of other 【C16】______ . As a result, the blood vessels in the leg cannot swell.
Therefore, the blood has nowhere to go but back to the heart. What about blood rushing to the head 【C17】______ the giraffe bends down to drink? The researchers found that the giraffe’s jugular vein, which 【C18】______ blood from the head back to the heart, has lots of one-way valves in it. In the giraffe’s neck, there are lots of muscles that flex and relax repeatedly as the animal moves its head and sucks 【C19】______ drinking water. By squeezing the valved jugular vein, they 【C20】______ blood moving back to the heart even while the animal is drinking. [br] 【C19】
选项
A、in
B、up
C、to
D、from
答案
B
解析
惯用搭配题,suck up意为“吸收”,suck in意为“利用;欺骗;诈取”,to和from不能和suck搭配,suck up符合句意,所以B正确
转载请注明原文地址:https://tihaiku.com/zcyy/2845191.html
相关试题推荐
Anadultgiraffe’sheadisaboutsixfeetaboveitsheart.Thismeansthatto【C
Anadultgiraffe’sheadisaboutsixfeetaboveitsheart.Thismeansthatto【C
Anadultgiraffe’sheadisaboutsixfeetaboveitsheart.Thismeansthatto【C
Anadultgiraffe’sheadisaboutsixfeetaboveitsheart.Thismeansthatto【C
Anadultgiraffe’sheadisaboutsixfeetaboveitsheart.Thismeansthatto【C
Anadultgiraffe’sheadisaboutsixfeetaboveitsheart.Thismeansthatto【C
Anadultgiraffe’sheadisaboutsixfeetaboveitsheart.Thismeansthatto【C
Anadultgiraffe’sheadisaboutsixfeetaboveitsheart.Thismeansthatto【C
Anadultgiraffe’sheadisaboutsixfeetaboveitsheart.Thismeansthatto【C
Anadultgiraffe’sheadisaboutsixfeetaboveitsheart.Thismeansthatto【C
随机试题
AtleastsincetheIndustrialRevolution,genderroleshavebeeninastate
[originaltext]Manyyoungpeoplestruggletogetagoodnight’ssleepwhich
Thereisnodoubtthatadults,andevenhighlyeducatedadults,varygr
( )是工程质量评定的基本单元。A.单位工程 B.合同段 C.分部工程
D糖厂是甜菜制糖企业,1991年11月建成投产,占地面积100万m2,共有员工5
由于服饰既是导游内在气质和文化修养的反映,又是游客审美的对象,因此导游的服饰应该
监事可以通过以下会议选举产生()。 Ⅰ.创立大会 Ⅱ.股东大
地西泮不具有A.镇静、催眠、抗焦虑作用B.抗抑郁作用C.抗惊厥作用D.对快动眼睡
房地产开发项目转让除经有关部门批准外,还需要办理开发建设者更名手续和()。A.
计划工期等于计算工期的双代号网络计划中,关于关键节点特点的说法正确的是( )。
最新回复
(
0
)