【判断题】
用手压不碎，焦渣的上、下表面均有银白色金属光泽，但焦渣表面具有较小的膨胀泡，其焦渣特征为5。
查看试卷，进入试卷练习
微信扫一扫，开始刷题
相关试题
【判断题】
焦渣表面无光泽，下表面稍有银白色光泽的焦渣特征为不膨胀熔融黏粘。
【判断题】
进行煤的工业分析测定时,进行检查性干燥,如连续两次干燥煤样的质量增加时,采用最后一次的质量为计算依据。
【判断题】
煤的灰分是煤中所有可燃物质完全燃烧后剩下的残渣，它是煤中原有的成分。
【判断题】
用快速灰化法测灰时，当灰分大于15%时，需进行检查性灼烧，每次15分钟，直到连续两次干燥质量变化不超过0.001g为止。
【判断题】
快速灰化法测定值高于缓慢灰化法测定值。
【判断题】
煤氧化后会导致碳损失，而使挥发分增加。
【判断题】
进行挥发份测定两次结果分别为15.46%和15.77%，其平均值为15.62%。
【判断题】
煤的挥发分不是煤中原来固有的挥发性物质。
【填空题】
1、测定煤中全水分时，对某煤样10g进行干燥后，其数据如下：9.80、9.75、9.76，则该煤样的全水分为 ___。
【填空题】
2、煤的全水分的测定应用的国标是___。
【填空题】
3、烟煤胶质层测定应用的国标是___。
【填空题】
4、挥发分测定后，坩埚中的残余物称为___，它的特征分为___种。
【填空题】
5、煤中全水分测定结果保留小数点后___位。
【填空题】
6、烟煤粘结指数测定应用的国标是___。
【填空题】
7、工业分析项目中的固定碳含量不是测定而是通过___得来的。
【填空题】
8、造成灰分测定误差的主要因素有黄铁矿的___、___和___。
【简答题】
影响粘结指数测定结果的因素有哪些？试验中应注意哪些问题？
【单选题】
世界上第一台电子数字计算机采用的电子器件是？
A. 大规模集成电路
B. 集成电器
C. 晶体管
D. 电子管
【单选题】
一个完整的计算机系统由硬件系统和_____两大部分组成。
A. 操作系统
B. 软件系统
C. 语言系统
D. 磁盘系统
【单选题】
操作系统是一种____。
A. 应用软件
B. 软件和硬件的统称
C. 数据库软件
D. 系统软件
【单选题】
windows中的任务栏____。
A. 可以在屏幕的四周放置
B. 只能在屏幕的底部放置
C. 只能在屏幕的右边放置
D. 只能在屏幕的左边放置
【单选题】
在菜单栏中某个命令暂时无效时，该命令应该___
A. 后跟“······”
B. 前有“”
C. 呈暗淡显示
D. 后跟三角形符号
【单选题】
在windows中 恢复被误删的文件应使用______
A. 计算机
B. 文档
C. 控制面板
D. 回收站
【单选题】
当前计算机已经应用于各种领域，而计算机最早的设计是应用于____
A. 数据处理
B. 科学计算
C. 辅助设计
D. 过程控制
【单选题】
下面关于对话框的叙述中，正确的是
A. 既不能移动 也不能更改大小
B. 只能移动 但不能改变大小
C. 对话框与窗口一样也有菜单栏
D. 对话框可以缩小成图标
【单选题】
要选择连续的若干个文件或文件夹，单击第一个文件或文件夹，按住 键，在单击最后一个文件或文件夹
A. alt
B. Shift
C. Enter
D. ctrl
【单选题】
在windows中，“桌面”是指
A. 某个窗口
B. 某个活动窗口
C. 全部窗口
D. 整个屏幕
【单选题】
在窗口中，单击“最小化”按钮后
A. 当前窗口被关闭
B. 当前窗口消失
C. 打开另一个窗口
D. 当前窗口在任务栏中缩小为图标后运行
【单选题】
要把当前窗口内容作为一幅图像复制到剪贴板，一般可按。 键
A. Shift➕printscreen
B. PrintScreen
C. ctrl➕printScreen
D. Alt➕Printscreen
【单选题】
通常所说的“裸机”是指计算机仅有。
A. 硬件系统
B. 软件
C. 指令系统
D. CPU
【单选题】
一般计算机系统中必不可少的输出设备是。
A. 软盘驱动器
B. 音箱
C. 显示器
D. 打印机
【单选题】
局域网的网络硬件主要包括服务器 工作站 网卡和。______
A. 计算机
B. 传输介质
C. 网络协议
D. 网络拓扑结构
【单选题】
Internet属于_____
A. 内部网
B. 局域网
C. 国际互联网
D. 公用电话网
【单选题】
下面 ____是政府部门的网站
A. http：//www.pku.edu.cn
B. http：//www.163.net
C. http://www.whitehouse.gov
D. http：//www.microsoft.com
【单选题】
Intermet使用的基本网络协议是
A. IPX/SPX
B. TCP/IP
C. NetBEUI
D. OST
【单选题】
在word中，在文本选择区单击鼠标，可选定
A. 一句
B. 一行
C. 一段
D. 整个文本
【单选题】
word中的段落标记符号是通过 产生的
A. 插入分页符
B. 按【Enter】
C. 插入分页符
D. 按【shift➕Enter】
【单选题】
1．在Word 2010的编辑状态下，打开了一个已有文档A l.doc，接着打开“文件”选项卡，在左侧单击“新建”命令，选择“新建空白文档”按钮，这时__________。
A. Al.doc被关闭
B. Al.doc和新建文档均处于打开状态
C. 新建 操作失败
D. 新建文档被打开但A1.doc被关闭
【单选题】
Word 中能显示页眉和页脚的视图方式是________
A. 普通视图
B. 页面视图
C. 大纲视图
D. Web版视图
推荐试题
【单选题】
How much did the Defense Department give Oregon schools? ___
A. $70,000
B. $1.3 million
C. $700,000
D. $1.3 billion
【单选题】
What’s Isabel Weiss’s purpose of learning Chinese? ___
A. For fun
B. For more opportunities for jobs
C. For more opportunities of making money
D. For more opportunities for promotions
【单选题】
What ability do the standardized tests reward to? ___
A. Think.
B. Create.
C. Quickly answer superficial questions.
D. Above all.
【单选题】
In what ways the IQ scores can be changed? ___
A. Training.
B. Nutrition.
C. More friendly people administered the test.
D. Above all
【单选题】
What do schools focus on? ___
A. Concepts.
B. Science.
C. Social Studies.
D. Foreign languages.
【单选题】
Why tests and standards are a necessary fact of life? ___
A. They protect us from hazardous products.
B. They protect us from inept drivers.
C. They protect us from shoddy professionals.
D. Above all.
【单选题】
How many percent did the scores on statewide tests rise? ___
A. 4%.
B. 14%.
C. 40%.
D. None.
【单选题】
What was the woman’s reaction when she was nominated? ___
A. She was surprised at the nomination.
B. She was calm at the nomination.
C. She was indifferent to the nomination.
D. She was scared of the nomination.
【单选题】
According to the woman, who paid for her trip to San Francisco? ___
A. Her trip to San Francisco was sponsored by the Academy.
B. Her trip to San Francisco was paid for by her company.
C. Her trip to San Francisco was paid for by her family.
D. Her trip to San Francisco was paid for by herself.
【单选题】
What is the name of George Miller’s new movie? ___
A. Happy Feeling.
B. Happy Dancing.
C. Happy Foot.
D. Happy Feet.
【单选题】
Which name is not mentioned in the film? ___
A. Nicole Kidman.
B. Hugh Jackman.
C. George Clooney.
D. Robin Williams.
【单选题】
Which of the following statement is not true about “Life in the Freezer”? ___
A. It was a documentary film.
B. It was made by National Geographic and the BBC.
C. It was a story of the amazing life of Emperor penguins.
D. The
E. mperor penguin sang to each other to find a mate and made friends.
【单选题】
What should you do during a high-pressure periods? ___
A. Lock yourself in a room with your work.
B. Leave your work and go on a vocation.
C. Tell your boss you can’t finish your work.
D. Get together with people who will revitalize and inspire you.
【单选题】
Which of the following is the correct description of TempWorld? ___
A. The era of guaranteed jobs is history.
B. We are all temporary workers.
C. You have to equip yourself with the skills.
D. All of the above.
【单选题】
What should a career activist do? ___
A. Being a career activist means concentrating on daily business.
B. Being a career activist means you can do a business as long as it meets your short-term needs.
C. A career activist should take the long view of his career.
D. A career activist should plan everything in advance.
【单选题】
What should you do in the TempWorld? ___
A. In TempWorld you must withstand disappointment, juggle stressful situations, and handle pressure.
B. You must learn from your setbacks and use them to your advantage in the future.
C. Things always go well for successful people because they are honest.
D. Both A and B.
【单选题】
Which of the following statements is Not True? ___
A. Your boss may be willing to change his behavior than your think.
B. Some managers don’t care how much their words or actions upset staffers.
C. You should tell your managers how their outbursts make you feel.
D. If the boss values your work, he may stop his abusiveness.
【单选题】
Which of the following public places is NOT mentioned that have banned mobiles? ___
A. restaurants
B. gas stations
C. theatres
D. museums
【单选题】
What happened when the cellphone of the speaker’s friend rang? ___
A. His friend answered the phone and the speaker became invisible to his friend.
B. They answered the phone together.
C. The speaker threw away his friend’s cellphone.
D. His friend hung up the phone and kept talking to the speaker. (C)
【单选题】
What happened to the man? ___
A. He had a car accident.
B. He had his arms broken.
C. He lost his mobile phone.
D. He was not able to use his mobile because he was in a remote area.
【单选题】
Which of the following is NOT true? ___
A. Today there are about 400 million cellphone owners.
B. Today there are about 300 million Personal Computer subscribers.
C. Cellphones will be more often used.
D. Cellphones will completely replace Personal Computers.
【单选题】
Which of the following is true? ___
A. Ellen Johnson-Sirleaf stayed in her country during the nation’s civil war.
B. She is still working for the United Nations.
C. She is the first woman ever elected president of an Asian country.
D. She is a Liberia.
【单选题】
What do you know about the solar eclipse? ___
A. Only hundreds of people gazed at it.
B. It was caused by the earth passing in front of the moon.
C. It was not often seen.
D. It started in Mongolia and ended in Brazil.
【单选题】
What is true about this meeting between the USA and China? ___
A. It was a meeting between Xi Jinping and Donald Trump.
B. It was the first time that the Chinese president had visited the United States.
C. The issue of the Olympics was discussed.
D. South Korea’s nuclear weapons program was discussed.
【单选题】
In which year did the station’s first permanent crew arrived? ___
A. 1998
B. 2000
C. 2002
D. 2003
【单选题】
If elected, ________________. ___
A. Richardson would be the first Hispanic President.
B. Clinton would be the first African-American President.
C. Romney world be the first Hispanic President.
D. Clinton would be the first Mormon President.
【单选题】
What are the things that the speaker’s inner and outer life based on? ___
A. Money
B. Health
C.
D. elicious food
【单选题】
What kind of things has its own reason for existing? ___
A. Questioning
B. The structure of reality
C. Curiosity
D. The mysteries of eternity
【单选题】
Who are so full of doubts? ___
A. Fools and fanatics
B. Wise people
C. Professors
D. University students
【单选题】
To the speaker, what kind of things always win in life? ___
A. Truth and love
B. Power and status
C. Great minds
D. Money and material
【单选题】
What’s the key word of the speaker? ___
A. Love
B. Power
C. Freedom
D. Curiosity
【单选题】
What happened to the man? ___
A. He committed identity theft.
B. He was put in prison.
C. He reported a case of theft to police.
D. He robbed a bank.
【单选题】
What is the attitude of Mrs. Washington? ___
A. She tries to cover up for little George.
B. She thinks Mr. Washington should not ask George directly.
C. She encourages George to chop down the tree.
D. She thinks Mr. Washington should put the blame on the sharp axe.
【单选题】
What do Nancy’s colleagues think about her transgender transition? ___
A. They think it is ridiculous.
B. They make a big fuss about it.
C. They take it lightly.
D. They are sympathetic.
【单选题】
What are the two women talking about? ___
A. They are talking women’s liberation.
B. They are talking about an ideal husband.
C. They want a rewarding job.
D. They are talking about women’s choice between family and career.
【单选题】
According to what you’ve heard, which of the following is NOT true? ___
A. The two ten-minute workouts help people get into shape in a short time.
B. The two ten-minute workouts are designed for the people of certain level of fitness.
C. The two ten-minute workouts help people to lose weight and to be vigorous.
D. The two ten-minute workouts are suitable for most people.
【单选题】
What does Cindy say about visiting Costa Rica in June? ___
A. It is bad because June falls in the rainy season.
B. It is bad because there is almost no sunshine in June.
C. It is not bad because it seldom rains on the coast.
D. It is not bad because it does not rain all the time and in all the places.
【单选题】
What did the professor say about the translation of idioms across language? ___
A. Almost all idioms are translatable and can be universally used.
B. Idioms are hardly translatable and cannot be universally used.
C. Not all idioms are translatable but many have translations in other language.
D. All idioms are translatable and tend to become international.
【单选题】
According to Professor Randal, which of the following is true for SAT II? ___
A. It tests your critical thinking and problem-solving skills.
B. It is more content oriented.
C. It is designed to measure subject-area knowledge.
D. It is designed to measure achievement in
E. nglish, math, reading, and science.
【单选题】
The movie in IMAX format adds the amazing effects except ___________. ___
A. the effect of sound
B. the effect of view
C. the effect of landscape
D. the effect of mystery
