更多“抽出式配电柜的安装应符合（）规定。”相关的问题
最小相位控制系统的开环对数幅频特性如图所示。试求开环传递函数G（S）；并求单位斜坡函数输入时闭环控制系统的稳态误差。
最小相位控制系统的开环对数幅频特性如图所示。试求开环传递函数G（S）；并求单位斜坡函数输入时闭环控制系统的稳态误差。
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下列属于混合产品的是()。
A.国防建设 B.行政管理 C.高等教育 D.传染病控制
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The strategic human resource management is the strategic approach to the effective management of people in an organization, so that it helps the business to gain the competitive advantages.
A . 对B . 错
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公关专题活动受经费制约。（）此题为判断题(对，错)。
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I/O调度程序所遵循的调度策略，可采用进程调度策略。例如，可采用（）和（）两种调度算法，但不能采用（）。
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8d男性新生儿，频繁呕吐，重时，吐物含粪便，伴便秘、腹胀。查体：腹部见肠型，肛诊直肠空虚感。 最可能的
8d男性新生儿，频繁呕吐，重时，吐物含粪便，伴便秘、腹胀。查体：腹部见肠型，肛诊直肠空虚感。最可能的诊断是A．肥厚性幽门狭窄B．幽门痉挛C．贲门松弛症D．巨结肠E．肠麻痹
最可能的诊断是A．肥厚性幽门狭窄B．幽门痉挛C．贲门松弛症D．巨结肠E．肠麻痹
A．肥厚性幽门狭窄B．幽门痉挛C．贲门松弛症D．巨结肠E．肠麻痹
B．幽门痉挛C．贲门松弛症D．巨结肠E．肠麻痹
C．贲门松弛症D．巨结肠E．肠麻痹
D．巨结肠E．肠麻痹
E．肠麻痹
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已知甲乙方案投资收益率的期望值为15％，乙方案投资收益率的期望值为12％，两个方案都存在投资风险。比较甲、乙两方案风险大小应采用的指标是（ ）。
A .
方差B .
净现值C .
标准差D .
标准差系数
在窗体上画一个命令按钮,名称为Commandl,然后编写如下事件过程:Private Sub Commandl_Click()Dim a() a=Array("机床","车床","钻床","轴承") Print aEnd Sub程序运行后,如果单击命令按钮,则在窗体上显示的内容是( )。
A. 车床 B. 轴承 C. 钻床 D. 机床
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下列哪种氨基酸属于非必需氨基酸？（）
A.苏氨酸
B.赖氨酸
C.谷氨酸
D.甲硫氨酸
E.色氨酸
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Health or Profit Although there is no direct evidence that salt is the cause of high blood pressure or "hypertension", there are studies which indicate that reducing salt intake lowers blood pressure. Some scientists are also concerned that excessive use of salt may cause asthma and kidney disease. Therefore most doctors would welcome a decision by food manufacturers to decrease the amount of salt in food. Many food manufacturers, however, are reluctant to reduce tile amount of salt. Salt is art important flavor enhancer and preservative. British Salt points out that salt is an essential nutrient and regular intake is required to maintain bodily functions. Moreover, according to British Salt, there are greater risk factors in hypertension, such as obesity (肥胖) , lack of exercise, alcohol intake and smoking. Another reason why food producers are not keen on lowering the amount of salt is probably that they fear that less salt will mean lower sales. Not only will the sale of processed food containing salt decease but also the sale of soft drinks. A recent study, published in The Lancet of April 1999, proves that if manufacturers cut the salt content of food it will not necessarily affect the taste of the product. Anthony Rodgers and Bruce Neal conducted a study to examine the difference in taste between bread with standard and reduced salt content. Three types of whole-meal bread were prepared, identical in all respects except for salt content. One loaf contained the standard quantity, one loaf 10% reduced and one 20% reduced. Sixty participants, who did not know the salt content were asked to rate the taste on a scale from zero to ten. They also had to guess which loaf contained the standard, 10% reduced and 20% reduced quantity. Of the 180 guesses of salt content, 63 were correct, which is not different from what would be expected by chance. The study by Rodgers and Neal indicates that small reductions in salt content will not necessarily affect sales. If food manufacturers decide to diminish the amount of salt in food, blood pressure of the entire population will shift downwards, which may result in considerable health benefits. One of Britain’s largest supermarkets, Asda, has already decided to decrease the amount of salt in its products. The Asda products will contain up to 25% less salt.
A. consumers B. authority C. businessmen D. food producers
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大型施工船舶或船队调遣起航后每天（）时应向主管单位调度部门报告航行情况
A．08：00B．12：00C．18：00D．20：00E．24：00
B．12：00C．18：00D．20：00E．24：00
C．18：00D．20：00E．24：00
D．20：00E．24：00
E．24：00
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企业下列业务的会计处理正确的有( )。
A．借：待处理财产损益—流动资产损益 贷：库存商品 应交税费—应交增值税(销项税额)B．借：营业外支出—库存商品对外捐赠 贷：主营业务收入 应交税费—应交增值税(销项税额)C．借：应付职工薪酬 贷：原材料 应交税费—应交增值税(进项税额转出)D．借：物资采购—劳动保护用品 应交税费—应交增值税(进项税额) 贷：银行存款E．借：物资采购—职工福利用品 应交税费—应交增值税(进项税额) 贷：银行存款
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淡水白鲳的受精卵在静水中为（）。
A、粘性
B、沉性
C、半浮性
D、沉粘性
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PowerPoint演示文稿中，在插入了一张来自文件的图片后，可以对该图片进行复制、移动、删除、改变、改变大小等操作。
A.对 B.错
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