更多“常用的化学诱变剂有（举3例）（）。”相关的问题
盲板的使用，说法不正确的是（）。
A . 停工检修的装置必须用盲板把与之相连的管线隔绝
B . 选用盲板时，盲板的公称压力应与之对应法兰的公称压力一致
C . 盲板应加在有物料来源的阀门前部法兰处
D . 根据不同的工况，选用的盲板厚度不同
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按照《施工企业工程建设技术标准化管理规范》规定，以下（）是施工企业工程建设标准化管理部门的主要职责。
A . 贯彻执行国家现行有关标准化法律、法规和规范性文件，以及工程建设标准
B . 审批工程建设标准体系表和企业技术标准
C . 审批企业工程建设标准化工作的长远规划、年度计划和标准化活动经费
D . 组织制订和落实企业工程建设标准化工作任务和目标
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公司分给小花一栋单元式住宅，请问什么是单元式住宅？
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《配电安规》大风天气巡线，应沿线路上风侧前进，以免触及断落的导线。事故巡视应始终认为线路带电，保持安全距离。夜间巡线，应沿线路内侧进行（）
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A wise man once said that the only thing necessary for the triumph of evil is for good men to do nothing. So, as a police officer, I have some urgent things to say to good people.Day after day my men and I struggle to hold back a tidal wave of crime. Something has gone terribly wrong with our once-proud American way of life. It has happened in the area of values. A key ingredient is disappearing, and I think I know what it is: accountability.Accountability isn"t hard to define. It means that every person is responsible for his or her actions and liable for their consequences.Of the many values that hold civilization together-honesty, kindness, and so on—accountability may be the most important of all. Without it, there can be no respect, no trust, no law—and ultimately, no society.My job as a police officer is to impose accountability on people who refuse, or have never learned, to impose it on themselves. But as every policeman knows, external controls on people"s behaviour are far less effective than internal restraints such as guilt, shame and embarrassment.Fortunately there still communities—smaller towns, usually—where schools maintaining discipline and where parents hold up standards that proclaim: "In this family certain things are not tolerated—they simply are not done!"Yet more and more, especially in our larger cities and suburbs, these inner restrains are loosening. Your typical robber has none. He considers your property his property; he takes what he wants, including your life if you enrage him.The main cause of this breakdown is a radical shift in attitudes. Thirty years ago, if a crime was committed, society was considered the victim. Now, in a shocking reversal, it"s the criminal who is considered victimized: by his underprivileged upbringing, by the school that didn"t teach him to read, by the church that failed to reach him with moral guidance, by the parents who didn"t provide a stable home.I don"t believe it. Many others in equally disadvantaged circumstances choose not to engage in criminal activities. If we free the criminal, even partly, from accountability, we become a society of endless excuses, where no one accepts responsibility for anything.We in America desperately need more people who believe that the person who commits a crime is the one responsible for it.
A．less self-disciplineB．better sense of disciplineC．more mutual respectD．less effective government
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参与双识别的T淋巴细胞是（）
A.TCRγδ-T细胞
B.TCRγδ+T细胞
C.TCRαβ-T细胞
D.TCRαβ+T细胞
E.以上都不是
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已知一个容量为10的样本频数的分布如下： xi 23.5 26.1 28.2 30.4 ni 2 3 4 1 用变换yi=10(xi-27)作简化计算，求与的值．
A.5
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当附加导线与接触网同杆合架时，其供电线，加强线，正馈线带电部分距支柱边缘的距离应不小于（）m。
A.1 B.2 C.3 D.4
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柴油机高压油路包括______、______、______、______等部件。
A. 高压油泵 B. 高压油管 C. 调速器 D. 喷油器
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新生儿脑重量平均为350克1岁时可达500克，（）接近成人水平达1200克.
A、2岁
B、4岁
C、3岁
D、6岁
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圆的半径为30mm，计算弧长为25mm所对应的圆心角弧度为（）。
A.1.2
B.0.8333
C.68.75
D.47.75
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关于资源管理的方法说法正确的是（）
A.人工管理、文件管理和数据库管理都有其使用的场合B.文件管理职能通过资源管理器来实现C.人工管理完全可以替代数据库管理D.数据库管理完全可以替代人工管理
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销售合同草案经审批同意后，企业应授权有关人员与客户签订正式销售合同。
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每个图像标签中都有（）属性，搜索引擎会读取该属性以了解图像的信息。因此，最好在所有插图的ALT属性中都有文字描述，并带上该页关键字在其中。
A.srcB.idC.altD.lang
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渗透后水洗时应（）
A.水压越高越好 B.水压越低越好 C.水温越高越好 D.水温越低越好 E.水温及水压适当
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