首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
专升本
An adult giraffe’s head is about six feet above its heart. This means that to【C1】______enough blood up to the brain the circulat
An adult giraffe’s head is about six feet above its heart. This means that to【C1】______enough blood up to the brain the circulat
admin
2016-03-05
41
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(晕倒)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(颈静脉的)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(曲折;收缩)and relax repeatedly as the animal moves its head and【C19】______up drinking water. By squeezing the valved jugular vein, they【C20】______blood moving back to the heart even while the animal is drinking.
【C15】
选项
A、many
B、very
C、much
D、less
答案
C
解析
空格后为两个形容词比较级,由此可知空格应该是能够修饰形容词比较级的词,结合句意可知长劲鹿腿和脚的皮肤和其他组织更坚硬,所以much符合句意,C正确。
转载请注明原文地址:https://kaotiyun.com/show/iTHC777K
本试题收录于:
英语题库普高专升本分类
0
英语
普高专升本
相关试题推荐
Everysporthasitsgreatlegends:soccerhasPele,andbasketballhasMichaelJordan.Isthereone【B1】______whompeopleconside
Everysporthasitsgreatlegends:soccerhasPele,andbasketballhasMichaelJordan.Isthereone【B1】______whompeopleconside
Everysporthasitsgreatlegends:soccerhasPele,andbasketballhasMichaelJordan.Isthereone【B1】______whompeopleconside
—Excuseme,Sir,istheswimmingpoolopenallday?—______Onlyfrom6:00amto10:00pm.
Parentshavetodomuchlessfortheirchildrentodaythantheyusedtodoandhomehasbecomemuchlessofaworkshop.Clothes
Summerswithfatherwerealways【B1】______Swimming,hiking,boating,fishing—thedayswerenotlongenoughto【B2】______allofour
TheUnitedStatesiswell-knownforitsnetworkofmajorhigh-waysdesignedtohelpadrivergetfromoneplacetoanotherinth
Itisimportantthatenoughmoney______tofundtheproject.
InAmerica,itisnotcustomaryforparentstolivewiththeirmarriedchildren.
随机试题
Manyteachersbelievethattheresponsibilitiesforlearningliewiththestudent.【61】alongreadingassignmentisgiven,instru
A.儿童B.青少年C.青年D.壮年E.老年月骨无菌性坏死多见于
食管胃底静脉曲张破裂大出血患者,既往有冠心病史,以下处理哪项是正确的
音频信号是模拟信号,它不仅在()取值上是连续的,而且在()上也是连续的。
依据《固体废物污染环境防治法》,要关闭、闲置或者拆除生活垃圾处置的设施、场所的,必须经( )核准,并采取措施,防止污染环境。
狭义国际收支,简单地说,指一国()。
下列属于基金运作费的是()。
下列行为中,不构成代理的是()。
若随机变量X1,X2,…,Xn相互独立同分布于N(μ,22),则根据切比雪夫不等式得P{|一μ|≥2}≤________.
Appendblank命令的作用是______。
最新回复
(
0
)