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
At what point in the semester does this talk take place?
At what point in the semester does this talk take place?
admin
2011-03-01
23
问题
At what point in the semester does this talk take place?
Good afternoon. My name is Mary Raffety. For the next eleven weeks, I will be your lab instructor. The lab experiences you will be having are designed to complement your work in Dr Kaplan’s inorganic chemistry course. Today’s experiment is purposely a short one; 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. 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: don’t wear long scarves that might catch fire; don’t smoke; don’t taste unknown substances.
Let me reinforce this point with a story. Issac 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.
选项
A、Taking care of the students’ safety.
B、Grading their lab notebooks.
C、Helping set up the experiments.
D、Giving them lectures on physics.
答案
D
解析
独白第二段集中说明了女士的职责。其中提到了assist you setting up your experiments and understanding your results([C] )、grade your lab notebooks ([B] )及your physical safety([A] ),只有[D] 未提及。对于这种题,考生应在预读题目的基础上,听音时在相应选项上进行标记。
转载请注明原文地址:https://kaotiyun.com/show/FFjd777K
本试题收录于:
公共英语三级笔试题库公共英语(PETS)分类
0
公共英语三级笔试
公共英语(PETS)
相关试题推荐
Wheredoestheconversationmostprobablytakeplace?
Wheredoestheconversationmostprobablytakeplace?
Finishingteacher’sevaluationsneedmaturityandobjectivity.Everysemesterwehavetheopportunitytoevaluateourinstruct
Forsometimepastithasbeenwidelyacceptedthatbabies--andothercreatures--learntodothingsbecausecertainactsleadto
Ifwomenaremercilesslyexploited(剥削)yearafteryear,theyhaveonlythemselvestoblame.Becausetheytrembleatthethought
Ifwomenaremercilesslyexploited(剥削)yearafteryear,theyhaveonlythemselvestoblame.Becausetheytrembleatthethought
Oneoftheearliestchangesexperiencedbynewlymodernizingcountriesisthereductionofinfectiousdiseasethroughthediffus
WhenwethinkofHollywood,atermIuselooselytodescribeAmericanmovieproductioningeneral,notsimplyfilmsmadeinLos
StandingontherimoftheGrandCanyon(大峡谷),gazingacrossthisgiantwouldintheEarth’ssurface,avisitormightassumethat
随机试题
Hardly______comehere______thepartybegan.
A.漏出液B.渗出液C.脓性胸液D.血性胸液E.乳糜性胸液系统性红斑狼疮所产生的胸腔积液为()。
幼儿园课程实施的第一责任人是()。
人类前行的历史,是多元文化______、______的过程。继承和弘扬古今中外优秀文化,将不同的文明融会贯通势在必行。填入横线部分最恰当的一项是()。
周庄旅游收入已连续多年超亿元大关。在苏南,与周庄媲美的文化古镇虽不在少数,但旅游收入却只能望周庄而兴叹。当地的一位老人说,上世纪70年代陈逸飞画了这里的双桥,此画在美国展出时获奖并被石油大亨哈默斥巨资收藏。1979年邓小平访美时,哈默将此画赠给他,并说这是
《三国演义》《水浒传》《西游记》和《金瓶梅》合称“明代四大奇书”,这四部小说基本上代表了中国古代小说的四种类型,即历史演义小说、英雄传奇小说、神魔小说和世情小说。
社会主义初级阶段先进和落后的并存,是我国基本国情的重要特点,它决定了社会主义初级阶段的发展具有的总的基本特点是()
A是3阶矩阵,它的特征值互不相等,并且|A|=0,则r(A)=_______.
EXPEL:SCHOOL::
Malcolm,Mohammed,Lucy,SallyandRobinallhavepets.Malcolm,MohammedandRobineachhaveadog.Malcolmhasacat.Sally
最新回复
(
0
)