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
外语
A、The heart pumps blood in two directions. B、Time blood is circulated round the body in one direction only by the pumping action
A、The heart pumps blood in two directions. B、Time blood is circulated round the body in one direction only by the pumping action
admin
2010-01-26
98
问题
As is known to all, scientists and philosophers had studied the human body and its functions from very early times. Unfortunately, many of the ideas and theories, correct and incorrect, were accepted without question for a great number of years. But by the 16th century, knowledge gained through chemical experiments was beginning to make some people think more deeply about how the human body works.
A most important medical discovery was made by William Harvey in 1628. He found out that the blood is circulated round the body in one direction only by the pumping action of the heart. It had previously been incorrectly thought that the blood moved with a backward and forward motion.
Early in the 17th century a new instrument came into use that was to open up a whole new area in the study of medical and scientific matters. This was the microscope.
The first instruments were not very efficient. They were able to magnify only a very small part of the object and this was always surrounded by rings of coloured light. Nevertheless a great step forward had been taken which was of vital importance for future research and development.
选项
A、The heart pumps blood in two directions.
B、Time blood is circulated round the body in one direction only by the pumping action of the heart.
C、The blood moved with a backward and forward motion.
D、The heart pumps blood in all directions.
答案
B
解析
文中可以听到:He found out that the blood is circulated round the body in one direction only by the pumping action of the heart.由此可选定B。
转载请注明原文地址:https://www.kaotiyun.com/show/ZAdK777K
0
大学英语六级
相关试题推荐
Decision-makingisacomplexbusinesssubjectwhichcombinesthemostcomplicatedelementsoftheoperationaland(36)______asp
A、Tomisalwayslate.B、Tomwillnotshowup.C、Tomisusuallyontime.D、Tomwillbethereat8:30.AM:When’sTomcoming?I’m
Duringthelastfewyears,therehasbeenan(36)______increaseinthenumberofshops,storesandsupermarketswhichprovide(
A、Hesleptintheoffice.B、Hewentshoppingforaclothes.C、HewenttoMary’shousetoseehim.D、Hedidnothingatall.CWhat
A、Hecouldn’tmakeanysenseoutofhiscourse.B、Hehash’ttakenmorethanonephilosophycourse.C、Heisaphilosophymajor.
A、Theylefttheirpetswithneighbors.B、Theyrentedtheirhousetoastudent.C、Theyhiredsomeonetostayintheirhome.D、The
A、Sheworkedinasupermarketfortuition.B、Shehelpedsomeonetolearntoread.C、Shegavesinglemothersthehelpthattheyn
TheBushadministrationhasagreedtospeedeffortstoprotecttwenty-ninekindsofanimalsandplantsthataremostindangero
Thegrowthofpart-timeandflexibleworkingpatterns,andoftrainingandretrainingschemes,______(使得更多妇女能够充分地利用就业机会).
Itissurprisingthatmychoice__________________________(证明是个可怕的错误).
随机试题
TheNorwegianNobelCommitteehasdecidedto【21】theNobelPeacePrizefor1998toJohnHumeandDavidTrimblefortheirefforts
胃的特性之一是
小儿外周血白细胞总数接近成人水平的年龄是
下列土石方工程单项合同额中,属于小型工程的是()万元。
为购建固定资产而专门借入的款项,所发生的折价或溢价的摊销,在所购建的固定资产达到预定可使用状态之前发生的,应()。
下列各项中,可能构成长期股权投资初始投资成本的有()。
有两个样本在正态概率纸上的描点呈平行状,则有________。
当前,安徽省旅游产业呈现加速发展态势,但整体上还处于初级阶段。()
下列叙述中正确的是( )。
A、 B、 C、 B
最新回复
(
0
)