更多“切换式换热器的冷端温差的控制值与什么因素有关？”相关的问题
What is indicated about the man
A．He has finished reading the report.
B．He has signed an agreement.
C．He has written a draft summary.
D．He has been busy with other work.
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播种后出苗前杀草，使用的除草剂应是（）
A . A、残效期短的除草剂
B . B、残效期长的除草剂
C . C、移动性小的除草剂
D . D、移动性大的除草剂
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Research Is a State of Mind For many years there has been much misunderstanding as to just what research is. The popular conception seems to be that there is something mysterious about it， and before any research can be done it is necessary to have expensive scientific apparatus and large， elaborately equipped laboratories. Actually， this is not so. （6） It is a simple， organized way of trying to accomplish something you wish to do—so simple that anyone can do research anywhere at any time. First， you select the problem you would like to solve， then you list at least ten reasons why it has not been solved. （7） It takes just as much effort to solve a useless problem as a useful one. （8） After carefully—and I want to emphasize that word “carefully”—selecting the problem and the ten things between you and the solution， you then use the same procedure as in solving a crossword puzzle.（9）In the solution of the remaining obstacles you may need some simple apparatus， but the things you will probably need most are infinite patience and persistence. Few people realize the difficulties of doing any new thing. Maybe one of the reasons people are so easily discouraged is because of their education. During all our years at school we were examined two or three times a year. If we failed once， we were out. （10）If we are going to make progress， we must learn to fail intelligently so that we won't become discouraged at the 99.9 per cent failure.7.（）
A.Make sure the game is worth the candle. B.That is a step in the right direction， but I don't believe it is enough. C.You take the easy obstacles first and by a process of elimination you eventually arrive at the one or two major ones. D.But in selecting the problem， you need to be sure to analyze it carefully to see that it is worth the effort. E.Research isn't a physical thing at all； it's a state of mind. F.By contrast， all research work is 99. 9 per cent failure and， if we succeed once， we are in.
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直立型、下垂型标准喷头溅水盘与顶板的距离不应大于（）。
A.75mm B.100mm C.150mm D.300mm
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商品煤分品种、分国别以1000t为一基本采样单元。
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根据2014年新修订的《企业法人登记管理条例施行细则》，违反国家其他有关规定，从事非法经营的，责令停业整顿，没收非法所得，处以非法所得额（）倍以下的罚款，但最高不超过（）万元，没有非法所得的，处以（）万元以下的罚款；情节严重的，吊销营业执照。
A . 3；3万元；1万元
B . 2；3万元；2万元
C . 3；5万元；1万元
D . 2；5万元；2万元
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离子色谱法测定氯化物、氟化物等阴离子时，含有机物水样可经过( )柱过滤除去。
A．C12
B．C16
C．C18
D．C20
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会计师事务所应当对审计工作底稿实施适当的控制，以下说法中，恰当的有______。
A．会计师事务所应当能够保护底稿信息的完整性和安全性
B．底稿应当能够清晰地显示其生成、修改及复核的时间和人员
C．非审计项目组成员不能接触底稿
D．未经授权不能改动底稿
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人生态度是人们通过生活实践所形成的对人生问题的一种稳定的心理倾向和精神状态,它既具有态度的一般共性,又有自己的特点:
A . 具有社会性B . 具有内在性C . 具有针对性D . 具有相对稳定性
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（）要观测一次仓房地基基础的沉降，观测墙体是否开裂，并作好记录。
A . 每周
B . 每月
C . 每季
D . 每年
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使用可携式或移动式电动工具时，应戴（）或站在绝缘垫上；移动工具时，不得提着电线或工具的转动部分。
A . 绝缘手套
B . 手套
C . 口罩
D . 防护眼镜
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社区实验的主要目的是为了评价疾病预防措施的效果
A . 对B . 错
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Auto CAD的英文全称是( )。
A. Automatic Computer Aided Design B. Autodesk Computer Aided Design C. CAD2012 D. CAD2002
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下列哪位作家是世界三大短篇小说之王之一
A.契诃夫
B.伏尔泰
C.屠格涅夫
D.泰戈尔
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（)的纳税义务人应当具备下列条件：（1)在银行开设结算帐户;（2)独立建立帐簿，编制财务会计报表;（3)独立计算盈亏。
A、企业所得税B、营业税C、关税D、增值税
B、营业税C、关税D、增值税
C、关税D、增值税
D、增值税
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