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密度r=830kg/m3,黏度m=2cP的某液体,在内径为100mm,以流速2m/s在圆管中流动,流动类型为 。

提问人:网友wuyuez 发布时间:2022-01-06
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更多“密度r=830kg/m3,黏度m=2cP的某液体,在内径为1…”相关的问题
第1题
用U型管压差计测量一段水流管压力差,已知压差计读数为10cm,则压力差为()。指示液密度为13600kg/m3

A. 10.3kpa

B. 20.3kpa

C. 15.3kpa

D. 12.3kpa

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第2题
资料 除上题资料外,另有如下三项:

1.买入价与卖出价的差率为±1.6‰。

2.美元现钞买入价:USD100=¥830,现钞卖出价与现汇卖出价相同。

3.人民银行提供当天国际金融市场成交价:USD1=SFR1.6,£1=USD1.8200。

[提示] (1)一般外币间的折算可参阅教材第70页末的新规定。但通过银行的兑换则要按第83页的传统操作法分别作卖与买,银行赚取差价;(2)旅行支票是外国人在其本国银行购买的可到旅行地的他国银行提款的支票,可以通过银行的国际清算业务进行汇划了结。

要求

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第3题
某大面积压实填土建筑地基进行现场静载荷载试验,实测得三个测点的地基承载力特征值分别为:180kPa、190kPa,196kPa。试问:该压实填土地基承载力特征值fak(kPa)最接近下列()项。()

A. 180

B. 188.7

C. 190.3

D. 196

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第4题
一、要求

(一)将上题中1、2两金额按:(a)征关税;(b)付进口货款;(c)收出口货款;(d)中外合资企业收到外方出资,现汇开户入账;(e)一般入账(无现汇购售交易的转账事项)等五种情况进行折合。

(二)将上题中3、4两金额按企业银行存款户余额兑取另一币种外汇存款备用。

(三)上题中5、6两金额系指企业派员出国订货需随带旅途用外钞。

(四)保税区厂商原收取外商付来外币现钞SFR16000,又旅行支票及电汇汇票各£5000,现需用人民币,向银行进行兑换。

二、资料 除上题资料外,另有如下三项:

1.买入价与卖出价的差率为±1.6‰。

2.美元现钞买入价:USD100=¥830,现钞卖出价与现汇卖出价相同。

3.人民银行提供当天国际金融市场成交价:USD1=SFR1.6,£1=USD1.8200。

提示 (1)一般外币间的折算可参阅教材第70页末的新规定。但通过银行的兑换则要按第83页的传统操作法分别作卖与买,银行赚取差价;(2)旅行支票是外国人在其本国银行购买的可到旅行地的他国银行提款的支票,可以通过银行的国际清算业务进行汇划了结。

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第5题
ThinkServer RD830可以支持以下哪些操作系统 ?()

A. VMWarevSphereHypervisor5

B. RedhatEnterpriseLinuxServer6.2

C. WindowsServer2008R2

D. MicrosoftWindowsServer2012

E. NovelSUSELinuxServer11.2

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第6题
【程序】

SET TALK OFF

CLEAR

SS=0

FOR X=1 TO 10 STEP 3

SS=SS+X

ENDFOR

? SS

SS的输出结果为 ______。

A.22

B.18

C.12

D.19

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第7题
Many people talked of the 288,000 new jobs the Labor Department reporled for Jure, along with the drop in the unemployment take to 6 J percent. at good news. And they were right. For now it appears the economy is creating jobs at a decent pace. We still have a long way to go to get back to full employment, but at least we are now finally moving forward at a faster pace.

However there is another important part of the jobs picture that was targely ovedookcd. There was a big jump in the number of people who report voluntarily working part-time. This figure is now 830,000(4,4 percent)above its year ago level.

Before explaining the connection to the Obamacare, it is worth making an important distinction. Many people who work part-time jobs actually want full-time jobs. They take part-time work because this is all they can get. An increase in involuntary part-time work is evidence of weakness in the labor market and it means that many people will be having a very hard time making ends meet. There was an increase in involuntary part-time in June, but the general direction has been down. Involuntary part-time employment is still far higher than before the recession, but it is down by 640,000(9 percent)from its year ago level.

We know the difference between voluntary and involuntary part-time employment because people tell us. The survey used by the Labor Department asks people if they worked less than 35 hours in the reference week. If the answer is "yes."they are classified as working part-time. The survey then asks whether they worked less than 35 hours in that week because they wanted to work less than full time or because they had no choice. They are only elassified as voluntary part-time workers if they tell the survey taker they chose to work less than 35 hours a week.

The issue of voluntary part-time relates to Obamacare becanse one of the main purposes was to allow people to get insurance outside of employment. For many people, especially those with serious health conditions or family members with serious health conditions, before Obamacare the only way to get insurance was through a job that provided health insurance.

However, Obamacare has allowed more than 12 million people to either get insurance through Medicaid or the exchanges. These are people who may previously have felt the need to get a full-time job that provided insurance in order to cover themselves and their families. With Obamacare there is no longer a link between employment and insurance.

36. Which part of the jobs picture was neglected?

A.The prospect of a thriving job market.

B.The increase of voluntary part-time jobs.

C.The possibility of full employment.

D.The acceleration of job creation.

Many people work part-time because they___________________A.prefer part-time jobs to full-time jobs

B.feel that is enough to make ends meet

C.cannot get their hands on full-time jobs

D.haven' t seen the weakness of the market

The text mainly discusses___________________.A.employment in the US

B.part-timer classification

C.insurance through Medicaid

D.Obamacare's trouble

Involuntary part-time employment in the US___________________A.is harder to acquire than one year ago

B.shows a general tendency of decline

C.satisfies the real need of the jobless

D.is lower than before the recession

It can be learned that with Obamacare,___________________ . A.it is no longer easy for part-timers to get insurance

B.employment is no longer a precondition to get insurance

C.it is still challenging to get insurance for family members

D.full-time employment is still essential for insurance

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第8题
以下哪种进料热状况进料下,提馏段下降液体的摩尔流量大于精馏段( )

A、冷液体进料

B、饱和液体进料

C、饱和蒸汽进料

D、过热蒸汽进料

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第9题
边界层的定义是 。边界层按其中的流型可分为 和 。
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第10题
某流体在圆形直管中作滞流流动时,其速度分布是 型曲线,其管中心最大流速为平均流速的 倍,摩擦系数λ与Re的关系为 。
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