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
2023-07-22
86
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/2860540.html
相关试题推荐
[originaltext]Mr.Bush’sDemocraticpartyopponentsrepeatedlypointedout
[originaltext]Mr.Bush’sDemocraticpartyopponentsrepeatedlypointedout
[originaltext]Mr.Bush’sDemocraticpartyopponentsrepeatedlypointedout
[originaltext]Mr.Bush’sDemocraticpartyopponentsrepeatedlypointedout
[originaltext]M:Today,I’minterviewingayoungladyAlexaboutherfeelingso
[originaltext]M:Today,I’minterviewingayoungladyAlexaboutherfeelingso
[originaltext]M:Today,I’minterviewingayoungladyAlexaboutherfeelingso
[originaltext]M:EnglishLanguageCenter.HowmayIhelpyou?W:Yes.I’mcalli
[originaltext]M:DoyouthinkKaritookyourbooks?W:Yes,butIthinkitwasa
[originaltext]M:DoyouthinkKaritookyourbooks?W:Yes,butIthinkitwasa
随机试题
Manystudentsfindtheexperienceofattendinguniversitylecturestobeac
有关剪贴板的叙述,正确的是()。A.剪贴板上可放文本或图形 B.剪贴板上的
根据现行国家标准《平板玻璃》GB11614的规定,平板玻璃按其公称厚度可以分为(
运用收获现值法评估模型计算用材林资产价值时,需要考虑的要素有()。A.评估基准
初产妇,孕40周,妊娠晚期有细菌性阴道病病史,现规律宫缩16小时后自然分娩。产后
属于O/W型固体微粒类乳化剂的是A.阿拉伯胶 B.十二烷基硫酸钠 C.氢氧化
一住店客人未付房钱即想离开旅馆去车站。旅馆服务员揪住他不让走,并打报警电话。客人
经肝或相当药量经肝清除,肝功能减退时其清除或代谢物形成减少,可致明显毒性反应的药
暂列金额是指招标人在工程量清单中暂列并包括在合同价款中的款项,在工程量清单中应列
股份有限公司以超过股票票面金额的发行价格发行股份所得的溢价款,应当列为公司的盈余
最新回复
(
0
)