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
2023-09-02
77
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/2978837.html
相关试题推荐
[originaltext]AnenvironmentalgroupcalledtheFoodCommissionisunhappy
[originaltext]AnenvironmentalgroupcalledtheFoodCommissionisunhappy
[originaltext]I’mhavingproblemslivingwithColin.We’vebarelyspokento
[originaltext]I’mhavingproblemslivingwithColin.We’vebarelyspokento
[originaltext]W:Hello,Dr.Christianson.M:Hello,Cathy,whatcanIdoforyo
[originaltext]W:Hello,Dr.Christianson.M:Hello,Cathy,whatcanIdoforyo
[originaltext]W:I’mscurry,Mike.Ihavetoputoffourmeetingtillfouro’cl
[originaltext]W:I’mscurry,Mike.Ihavetoputoffourmeetingtillfouro’cl
[originaltext]W:I’mscurry,Mike.Ihavetoputoffourmeetingtillfouro’cl
[originaltext]Americancollegesanduniversitiesconsideranumberofthing
随机试题
Itismostinappropriate______inthecollegeVIPlounge.A、foranystudentstobe
Peopleoftenlaughwhentheyseepenguinswalking.Penguinslookveryfunnywadd
Gotapenhandy?Tobestestimateyourstart-upcosts,you’llneedtomakea
A.NaHCOB.NH·HOC.既能溶于热水,又能溶于亲脂性有机溶剂D.硫酸盐溶
以下选项中,属于被动管理方法特点的有()。A.采用此种方法的管理者认为,加工和分
A.胎儿成熟障碍 B.胆红素脑病(核黄疸) C.呼吸窘迫综合征 D.湿肺
教师威信的发展和维护,关键在于教师本身的自我塑造。
得神的面色特征是A.面色荣润,含蓄不露 B.面色少华,暗淡不荣 C.面
相对于公司债权人而言,优先股股东()。A.不可以要求经营成果不佳无法分配股利的公
最新回复
(
0
)