稳压电源输出的电压值是恒定不变的。-我要搜题网

[单选题]某新技术开发项目有甲、乙两种施工方案，且这两种方案的生产效率相同，甲方案的一次性投资为300万元，生产成本为20万元；乙方案的一次性投资为400万元，年生产成本为10万元。设基准收益率为6%，用折算费用法进行判别，则有（）。
A.甲方案优
B.乙方案优
C.两个方案经济效益相同
D.不能进行两个方案之间的优选

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[判断题]3.234. 第234题
在开展避雷针验收时,测得其导通电阻为150mmΩ,接地电阻为10.5Ω,其它要求均满足要求,故判断该避雷针验收合格。
A.正确
B.错误

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[单选题]NRA members have branded Donald Trump's plans for stricter gun control legislation“stupid”And a“betrayal”after the president suggested reforms on Wednesday.In an open meeting with congressional Democrats and Republicans,Trump embraced raising the age limit on purchasing certain weapons and suggested that law enforcement should be allowed to confiscate people's guns before going through due process in a court During the meeting Trump called for a beautiful"bill which would expand background checks on gun purchases and restrict young people from purchasing certain weapons.But it was his suggestion that in some cases law enforcement should be allowed to"take the guns first,go through due process second"that most alarmed gun owners on the right Dave Kopel,a benefactor member of the NRA-the highest level of membership--was also'scathing.He referred to past allegations of romantic infidelity and nefarious business practices against Trump.It is not exactly shocking when he betrays the people who elected him,he said The NRA leadership,which has generally supported Trump,and spent more than 30m helping get him elected,tentatively pushed back against the president on Wednesday night."I thought it made for really good TV but I thought some of what was discussed is going to make for really bad policy,"the NRA spokeswoman Dana Loesch told Fox News We're talking about punishing innocent Americans and stripping from them constitutional rights without due process,Loesch said The NRA is going to protect due process for innocent Americans and that is an approach that we're going to hold to.Due process must be respected."Robert McBride,a member of the NrA from Roscoe,Texas,said he was also troubled by Trumps idea to take away guns before a court ruling McBride said the plan would violate the fifth and fourteenth amendments to the constitution,which safeguard"life,liberty or property.Without those two amendments the government could just lock you up and throw away the key because some bureaucrat had a bad day or did not like the way you spoke to him.”Mc Bride said He was skeptical of Trump's advocating higher age restrictions for buying some guns.Twenty-one is not a magic age and if that's the bar for obtaining your second amendment right here in america then that should also be the bar for being put on trial as an adult,going to prison as an adult,enlisting in our armed services and voting in our elections.” How does Dana Loesch think of President Trump?
A.She believes Trump has betrayed his previous promise
B.She believes Trump deprived people's legal rights
C.She believes Trump tentatively opposes the NRA support
D.She believes Trump is good at TV and Twitter show

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[单项选择]中风的基本治疗原则是
A. 祛风、养血、通络
B. 化痰通腑
C. 调整阴阳
D. 理气开郁
E. 补虚泻实

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[单项选择]影响人群易感性降低因素是
A. 变量值间呈倍数关系的偏态分布
B. 表达同质计量资料的对称分布
C. 偏态分布资料或末端无界的资料，或频数分布不明资料
D. 表达同质量计量资料的偏态、分布
E. 变量值间无倍数关系的正态分布

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[单项选择]3Cr13钢是是（）不锈钢。
A. 奥氏体型
B. 马氏体型
C. 铁素体型
D. 奥氏体-铁素体型

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[单项选择]药物第Ⅱ相生物结合过程中，下列哪个基团不能与药物分子结合（）
A. 羟基
B. 羧基
C. 烷烃或芳烃
D. 含氮杂环
E. 氨基

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[判断题]　生产经营单位使用劳务派遣人员从事作业的，劳务派遣人员不计入该生产经营单位的从业人员人数。（ )
A.正确
B.错误

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[单选题]着火的电流互感器在确认( )已断开且保证人身安全的前提下，用灭火器材灭火。
A.各侧电源
B.电源
C.各侧刀闸
D.刀闸