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
医学
A、To illustrate what a great scientist he was. B、To explain why lab equipment must be cleaned carefully. C、To emphasize the need
A、To illustrate what a great scientist he was. B、To explain why lab equipment must be cleaned carefully. C、To emphasize the need
admin
2018-05-06
51
问题
Good afternoon. My name is Mary Raffety. For the next eleven weeks, (26) I will be your lab instructor. The lab experiences you will have are designed to complement your work in Dr. Kaplan’s inorganic chemistry course. Today’s experiment is purposely a short one, (27) it will help you become familiar with the lab setup and equipment.
As your lab instructor, it is my duty to assist you in setting up your experiments and understanding your results. I will also grade your lab notebooks. (28) But I have an even more basic responsibility: your physical safety. I will insist on proper precautions, such as wearing protective goggles at all times. I also expect you to use common sense: (29) don’t wear long scarves that might catch fire; don’t smoke; don’t taste unknown substances.
(30) Let me reinforce this point with a story. Isaac Newton, perhaps the greatest scientist of all ages, lived in a period when the toxic effects of chemicals were less understood than today. He routinely sniffed fumes, tasted chemicals, and used open containers for heating substances. In the early 1690s, he suffered through a period of insomnia, depression and mental instability. Though his biographers linked this situation to problems in his personal life, researchers now think it was a consequence of his lab procedures; they found abnormally high concentrations of lead, mercury and other heavy metals in preserved specimens of his hair.
Consequently, we must learn from the past and put safety first.
26.Who is the speaker?
27.At what point in the semester does this talk take place?
28.Why is the speaker addressing the students?
29.Which of the following are the students told not to wear?
30.Why does the speaker tell the story about Newton?
选项
A、To illustrate what a great scientist he was.
B、To explain why lab equipment must be cleaned carefully.
C、To emphasize the need for proper precautions.
D、To demonstrate how theoretical chemistry has advanced since his day.
答案
C
解析
题目问的是为什么要提到牛顿的故事。由定位句可知,提到牛顿生病的故事是为了强调实验安全步骤的重要性,故选C。
转载请注明原文地址:https://kaotiyun.com/show/PvT3777K
本试题收录于:
医学博士外语题库考研分类
0
医学博士外语
考研
相关试题推荐
A.保守治疗B.单纯疝囊高位结扎术C.无张力疝修补术D.疝囊高位结扎+疝修补术小儿腹股沟斜疝的治疗采用
Peoplehaveworriedaboutsmogformanyyears,andthegovernmenthasspentbillionsofdollarstotrytocleanuptheairofbi
Peeringintothecrowd,LuannosawRobinwalkingslowlytowardhisfather,hisheadtiltedtooneside.
Exceptformother’smilk,nodrinkboastsamore______reputationforyoungstersthanfruitjuice.
Twoequallybrilliantscientistsapplyforaprestigiousresearchfellowshipawardedbyatopscientificorganization.Oneiswh
Thedistinctionsbetweenthedifferentschoolsandapproachesareoftenvery______.
A、Itfeelsasiftheroomisgoingaround.B、Itfeelslikeakindofunsteadiness.C、Itfeelsasifsheisfallingdown.D、Itfe
TherearemanytheoriesaboutthebeginningofdramainancientGreece.Theonemostwidelyacceptedtodayisbasedontheassum
Beingamanhasalwaysbeendangerous.Thereareabout105malesbornforevery100females,butthisratiodropstonearbalanc
A、Onealwaysknowswhathismusclesaredoing.B、Oneperformssimpleactionswithoutworking.C、One’smusclesareusedonlytot
随机试题
患者胃痛,脘腹胀满,嗳腐吞酸,吐不消化食物,大便不爽,舌苔厚腻,脉滑。其治法是()
下列哪些情形属于骗取出口退税罪的“假报出口”行为?
设备工程投资控制的主体是( )。
下列热力管道敷设的要求,正确的是()。
在对生活境遇不良的儿童提供救助的过程中,()针对的是子女陷入非常危险的境地,需要短暂地或永久地解除亲子关系的家庭。
有一实心长方体金属块挂在弹簧测力计上,静止时弹簧测力计读数为F1,将此金属块全部浸没在水中,静止时弹簧测力计示数为F2,据此实验及所得数据,一定不能求出的物理量是()。
[*]
请在【答题】菜单下选择【进入考生文件夹】命令,并按照题目要求完成下面的操作。注意:以下的文件必须都保存在考生文件夹下。公司计划在“创新产品展示及说明会”会议茶歇期间,在大屏幕投影上向来宾自动播放会议的日程和主题,因此需要市场部助理小王完
Awalkwithyourspousegivesyouachancetotalkovertheday.Butthat’snotwhyyoushould【C1】______.Here’swhy:Getting【C2
Ataroundageoffive,everychildhastomakethe【C1】______fromhometoschool.Childrenatthisagehaveanenormousamountto
最新回复
(
0
)