更多“pH值大于（）后，pH值增大，造浆率也提高。”相关的问题
设函数f(x)=sin(x2)+e-2x，则f'(x)等于( )；
A．cos(x2)+2e-2x
B．2xcos(x2)-2e-2x
C．-2xcos(x2)-e-2x
D．2xcos(x2)+e-2x
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CSMA/CD技术只能用于()。
A.总线型拓扑结构
B.环形拓扑结构
C.星型拓扑结构
D.不规则拓扑结构
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定量预测法是依据大量的数据资料,运用统计分析和数学方法描述预测对象与影响因素之间的关系和规律,建立预测模型,计算出结果作为预测值。因此比定性预测更为科学、准确。
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哪些AWS 云设计原则可以帮助提高可靠性？（）
A.使用单体架构
B.衡量整体效率
C.测试恢复程序
D.采用消费模式
E.自动从故障中恢复
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对于采用压力润滑的空压机，巡回检查时其润滑油压应保持在（）MPa的正常范围内。
A.0-0.1
B.0.1-0.2
C.0.2-0.3
D.0.3-0.4
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Cell Phones:Hang Up or Keep Talking? Millions of people areusing cell phones today. In many places it is actually considered unusualnot to use one. In many countries, cellphones are very popular with young people. They find that the phones are morethan a means of communication-having a mobile phone shows that they are cooland connected. The explosions around theworld in mobile phone use make some health professionals worried. Some doctors are concerned that in the futuremany people may suffer health problems from the use of mobile phones. InEngland,there has been a seriousdebate about this issue. Mobile phone companies are worried about the negativepublicity of such ideas. They say that there is no proof that mobile phones arebad for your health. On the other hand,why dosome medical studies show changes in the brain cells of some people whouse mobile phones? Signs of change inthe tissues of the brain and:head can be detected with modern scanning(扫描)equipment In onecase,a traveling salesman had to retire at a young age because of seriousmemory loss. He couldn't remember evensimple tasks. He would often forget the name of his own son This man usedto talk on his mobile phone for aboutsix hours a day,every day of his working week,for a couple of years. His family do'ctor blamed his mobile phoneuse,but his employer's doctor didn't agree. What is it that makes mobilephones potentially harmful? The answer is radiation High-tech machines candetect very small amounts of radiation from mobile phones. Mobile phonecompanies agree that there is some radiation,but they 'say the amount is toosmall to worry about. As the discussion abouttheir safety continues,it appears that it's best to use mobile phones less often. Use your regular phone if you want totalk for a long time. Use your mobile phone only when you really need it. Mobile phones can be veryuseful and convenient,especiaIIY in emergencies. In the future,mobile phones may have a warning labelthat says they are bad for your health. So for now,it's .wise not to use yourmobile phone too often.People buy cell phones for the following reasons EXCEPT thatA.they ' re cheapB.they're popularC.they're usefuD.they're convenient
A.B.C.D.E.wiseF.PeopleG.theyH.they'reI.they'reJ.they're
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下列有关不确定性与风险关系表述正确的有( )。
A．不确定性与风险具有一致性B．风险与不确定性有紧密的联系但无区别C．不确定性是由于经济活动有风险才引起的D．不确定性与风险相伴而生E．投资项目具有的不确定性与风险紧密相连
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当光学系统的横向放大率β=-2时，说明所成像为（）像。
A.放大B.缩小C.正立D.倒立
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很多组织在评价完绩效之后，就将评价结果束之高阁，不将其应用到确定薪酬发放、职位晋升、培训与开发、绩效改进等方面，使评价对象也认为绩效评价只是“走形式”“走过场”，对绩效评价工作产生消极懈怠的情绪。这是绩效评价系统中的常见问题（）
A.评价目的不明确
B.评价标准模糊
C.评价方法选择不当
D.评价结果运用不充分
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一台变压器SN=5kV·A，一次绕组由两个同样的额定电压为3000V的线圈组成。二次绕组由两个同样的额定电压230V的
一台变压器SN=5kV·A，一次绕组由两个同样的额定电压为3000V的线圈组成。二次绕组由两个同样的额定电压230V的线圈组成。问这台变压器可以有哪几种电压比的联结法，每种联结法一次侧和二次侧的额定电压和额定电流各为多少？
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在罐中心点与单盘浮船边接角钢处（），以此为基准搭设组装单盘支架胎具。
A.焊一组挡板
B.拉一条钢丝
C.画一条线
D.点焊定位
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财政总预算会计中，各级财政年终结转“一般公共预算结转结余”时，应将()科目中相关的贷方余额转
财政总预算会计中，各级财政年终结转“一般公共预算结转结余”时，应将()科目中相关的贷方余额转入“一般公共预算结转结余”科目贷方。 A、一般公共预算收入 B、补助收入 C、上解收入 D、调入资金 E、专用基金收入
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近年来，市场上出现“红心鸭蛋”、“多宝鱼”、“福寿螺”等黑心食品，我国政府采用技术和法律手段严加监管，让消费者吃上放心、安全的食品。对此，下列说法正确的是：
A.市场调节有一定的局限性
B.政府在履行经济监管职能
C.我国政府是人民意志的执行者和利益的捍卫者
D.市场调节的缺陷是不可克服的
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从业人员调整工作岗位或离岗一年以上重新上岗时，应进行相应的车间(工段、区、队)安全生产教育培训。
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下面哪种固定液中含有过碘酸钠？（）
A . 4％多聚甲醛一磷酸二钠／氢氧化钠液
B . Zenker液
C . PLP液和PLPD液
D . PFG液
E . Müller液
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