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
54
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
Publicacceptanceofrabbitasaneconomicalsourceofproteindependson______.
现对某技术方案进行单因素敏感性分析,选择财务净现值作为分析对象,如下图所示,甲、
药物剂型是把医药品以不同给药()制成的不同(),简称剂型。
已知A物重力的大小P=20kN,B物重力的大小Q=30kN.滑轮C、D不计质量,
一般来说,()是服装搭配时最常用的颜色A:黑色 B:蓝色 C:灰色 D:白
对乳糜胸的叙述正确的是A.多发生在术后10~12天 B.患者常表现为胸闷、气急
A公司运用沙盘推演测评法测评和选拔企业高级管理人员,考察被试者的综合能力。
反转突破形态有()。A:平底(顶)B:双重底(顶)C:三角形底(顶)D:头
关于代理的说法,正确的有()A、项目经理是施工企业的代理人 B、项目总监理工程
共用题干 男性,10岁。发热10天,体温38~39℃,刺激性咳嗽明显,胸痛。查
最新回复
(
0
)