首页
登录
职称英语
[originaltext] As is known to all, scientists and philosophers had studied t
[originaltext] As is known to all, scientists and philosophers had studied t
游客
2023-08-01
61
管理
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 colored 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、The 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
What did William Harvey find out in 1628?
转载请注明原文地址:https://tihaiku.com/zcyy/2889000.html
相关试题推荐
[originaltext]Anewstudyhasfoundapositivecorrelationbetweenhowmuch
[originaltext]M:Hi,there!I’vecometoseetheflat.MynameisMarkAdams.W
[originaltext]M:WelcometoMoneyMatters,aweeklyprogramthathelpsyoumana
[originaltext]M:WelcometoMoneyMatters,aweeklyprogramthathelpsyoumana
[originaltext]Hello,everybody.Thelastdecadehasproventobevolatilea
[originaltext]Hello,everybody.Thelastdecadehasproventobevolatilea
[originaltext]Goodmorning.Haveyoueverboughtashirtordressonlineon
[originaltext]Moderator:Hello,ladiesandgentlemen.Itgivesmegreat
[originaltext]Moderator:Hello,ladiesandgentlemen.Itgivesmegreat
[originaltext]Moderator:Hello,ladiesandgentlemen.Itgivesmegreat
随机试题
Scienceandtechnologyisamongthefactorsthathavetakenthehumancivili
A.inappropriateB.attendC.slipsD.trackE.financeF.unchangeableG.organ
产生躯体依赖性的药物是()A.巴比妥类 B.苯二氮革类 C.苯妥英钠 D
工程建设强制性标准监督检查的内容不包括( )。A、有关工程技术人员是否熟悉、掌
直接标记法制备放射性标记结合物时,常用的氧化剂为A.氯胺T B.乳过氧化物酶
根据《立法法》的规定,行政法规签署公布后,应及时()上刊载。A.国务院
下列关于生产能力的说法,错误的是()。A.生产能力是按照直接参加生产的固定资产来
顾客要求供货合格品率须在99.9%以上,则顾客对产品提出的质量要求是()。
雄黄、白矾都具有的功效是( )。A.燥湿止痒 B.解毒杀虫 C.祛痰截疟
中药定性鉴别中使用最多的色谱法是A.纸色谱法 B.薄层色谱法 C.柱色谱法
最新回复
(
0
)