首页
登录
职称英语
[originaltext]S: Let’s talk about the results of your laboratory? experiment. D
[originaltext]S: Let’s talk about the results of your laboratory? experiment. D
游客
2024-02-23
59
管理
问题
S: Let’s talk about the results of your laboratory? experiment. Did you have any problems with it?
B: Yes, Professor Smith. We did.
S: Who’s your lab partner, Bob?
B: Anne Wilson.
S: Well, Anne, can you and Bob go over the procedure for the class?
A: Sure. Firs( we put ten grams of crushed limestone in a bottle.
S: Anything special about the bottle?
B: It was a gas - collecting bottle with a one - hole stopper and bent glass tubing.
S: Very good. So you put the limestone in a gas - collecting bottle. Then what?
A: Then we poured in ten milligrams of hydrochloric acid, put on the stopper, and collected a bottle of carbon dioxide.
S: Right, What was the method of collection?
A: Water displacement.
S: Good.
A: Then, we lit a magnesium ribbon and put it in the bottle or carbon dioxide.
B: And carbon deposits began to form on the bottom of the bottle, You see, we didn’t have any problem with procedure.
A: Well, we had a little problem getting the magnesium ribbon to stay lit until we could get it into the bottle.
B: Okay. But we did it. The big problem was that we really didn’t understand what happened. Did the magnesium combine with the oxygen in the carbon dioxide?
S: You have just answered your own question, Bob. The burning magnesium broke the carbon - oxygen bonds in the carbon dioxide, and then the oxygen combined with the magnesium to produce magnesium oxide.
A: And the carbon was freed to deposit itself on the bottle.
S: Exactly.
选项
A、To discuss the results of the lab experiment.
B、To answer Bob’ s question about the lab experiment.
C、To explain the method of collection by water displacement.
D、To prepare the students to do the lab experiment.
答案
A
解析
此类题目首先一定要听明白大概的意思,听的时候注意关键词,依据会话中“Let’s talk about the results of your laboratory experiment.”可以看出A为正确答案。
转载请注明原文地址:https://tihaiku.com/zcyy/3476804.html
相关试题推荐
Whatdoesthespeakersayabouttyphoons?[br][originaltext]Abitofrain
Whatdoesthespeakersayabouttyphoons?[originaltext]Abitofrainandwi
Whatdoesthespeakertellusabouttoday’sAmericans?[originaltext]Foral
WhatisthepurposeofTommyCarter’sresearch?[br][originaltext]ThomasT
WhatisthepurposeofTommyCarter’sresearch?[originaltext]ThomasTommyC
Whatistheman’sattitudetowardthestemcellresearch?[br][originaltext]M:
WhatdotheAmericandoctorssayaboutbabies?[br][originaltext]Somepeop
WhatdotheAmericandoctorssayaboutbabies?[originaltext]Somepeopletho
[originaltext]M:Excuseme,Madam.Youarenotsupposedtobehere.Thisareaisf
[originaltext]M:Excuseme,Madam.Youarenotsupposedtobehere.Thisareaisf
随机试题
FrictionbetweenAmerica’smilitaryanditscivilianoverseersisnothingne
Whatcanweinferfromthisnewsitem?[originaltext]TheNewYorkPhilharmo
Primaryschoolteachers’poor【C1】______ofEnglishandmathsisundermin
教育制度就是指学校教育制度。
根据构件命名规则,下列表述有误的是()。A.“FM1821甲”代表2100mm宽
网络中的一种控制可以确定数据向另一个节点传送过程中是否发生改变,这种控制是:A.
一般不会发生贫血性梗死的器官是()。A.心 B.脾 C.肾 D.肠
某商场共3层,每层设计安装1500只玻璃球喷头,商场设计采用预作用自动喷水灭火系
注意事项 1.本题本由给定材料与作答要求两部分构成。考试时限为180分钟。其中
患者,女,13岁,因斜视而进行手术治疗,术后出现频繁的恶心呕吐。该中药止吐的有效
最新回复
(
0
)