邮政法规定,邮件处理场所的设计和建设,应当符合什么?

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问题:

邮政法规定,邮件处理场所的设计和建设,应当符合什么?

考点:中级邮电经济邮政法邮政法题库
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[化学选修2:化学与技术]工业上为了使原料和能量得到充分的利用,常常采用循环操作.

Ⅰ、利用热化学循环制氢能缓解能源矛盾.最近研究发现,复合氧化物铁酸锰(MnFe2O4)可用于热化学循环分解水制氢.MnFe2O4的制备:

已知Fe3+、Mn2+沉淀的pH如表所示.

开始沉淀完全沉淀
Fe3+2.74.2
Mn2+8.310.4
(1)此工艺中理论上投入原料Fe(NO33和Mn(NO32的物质的量之比应为______.

(2)控制pH的操作中m的值为______.

Ⅱ、用MnFe2O4热化学循环制取氢气:MnFe2O4(s)

 1000K 
.
 
MnFe2O(4-x)(s)+
x
2
8O2(g);△H1=akJ/mol,

MnFe2O(4-x)(s)+xH2O(l)═MnFe2O4(s)+xH2(g);△H2=bkJ/mol,

(3)由上可知,H2燃烧的热化学方程式是______.

(4)该热化学循环制取氢气的优点是______(填字母编号).

A.过程简单、无污染         B.物料可循环使用   C.氧气和氢气在不同步骤生成,安全且易分离

Ⅲ、工业上可用H2、HCl通过如图的循环流程制取太阳能材料高纯硅.

反应①Si(粗)+3HCl(g)

 553--573K 
.
 
SiHCI3(l)+H2(g)

反应②:SiHCl3(l)+H2(g)

 1373K 
.
 
Si(纯)+3HCl(g)

(5)上图中,假设在每一轮次的投料生产中,硅元素没有损失,反应①中HCl的利用率和反应②中H2的利用率均为75%.则在下一轮次的生产中,需补充投入HCl和H2的体积比是______.

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We’ve reached a strange-some would say unusual-point.While fighting world hunger continues to be the matter of vital importance according to a recent report from the World Health Organization (WHO),more people now die from being overweight,or say,from being extremely fat,than from being underweight.It’s the good life that’s more likely to kill us these days.

Worse,nearly l8 million children under the age of five around the world are estimated to be overweight.What’s going on?

We really don’t have many excuses for our weight problems.The dangers of the problem have been drilled into us by public­health campaigns since 2001 and the message is getting through—up to a point.

In the 1970s,Finland,for example,had the highest rate of heart disease in the world and being overweight was its main cause.Not any more.A public­health campaign has greatly reduced the number of heart disease deaths by 80 per cent over the past three decades.

Maybe that explains why the percentage of people in Finland taking diet pills doubled between 2001 and 2005,and doctors even offer surgery of removing fat inside and change the shape of the body.That has become a sort of fashion.No wonder it ranks as the world’s most body­conscious country.

We know what we should be doing to lose weight—but actually doing it is another matter.By far the most popular excuse is not taking enough exercise.More than half of us admit we lack willpower.

Others blame good food.They say:it’s just too inviting and it makes them overeat.Still others lay the blame on the Americans,complaining that pounds have piled on thanks to eating too much American­style fast food.

Some also blame their parents-their genes.But unfortunately,the parents are wronged because they’re normal in shape,or rather slim.

It’s a similar story around the world,although people are relatively unlikely to have tried to lose weight.Parents are eager to see their kids shape up.Do as I say-not as I do.

小题1:What is the“strange”point mentioned in the first sentence?

A.The good life is a greater risk than the bad life.

B.Starvation is taking more people’s lives in the world.

C.WHO report shows people’s unawareness of food safety.

D.Overweight issue remains unresolved despite WHO’s efforts.小题2:Why does the author think that people have no excuse for being overweight?

A.A lot of effective diet pills are available.

B.Body image has nothing to do with good food.

C.They have been made fully aware of its dangers.

D.There are too many overweight people in the world.小题3:.The example of Finland is used to illustrate________.

A.the cause of heart disease

B.the fashion of body shaping

C.the effectiveness of a campaign

D.the history of a body­conscious country小题4:Which would be the best title for the passage?

A.Actions or Excuses?

B.Overweight or Underweight?

C.WHO in a Dilemma

D.No Longer Dying of Hunger

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民法规定,一项允诺可以通过明示或默示方法作出。所谓明示是行为人直接将自主决定的意思表示于外的允诺方法,包括口头明示和书面明示。 下列不属于明示范畴的是( )。

A.用户以通话形式申请提供服务

B.用户到营业厅办理信用卡手续

C.开车到收费停车场停车

D.授权朋友办理服务申请

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注册会计师在对鉴证对象作出合理一致的评价时,需要有适当的标准,下列有关标准的说法中,正确的有()。

A.对于公开发布的标准,注册会计师通常无需对标准的适当性进行评价,只需评价该标准对具体业务的适用性

B.标准应当具有相关性、完整性、可靠性、中立性和可理解性

C.采用的标准的类型不同,注册会计师为评价该标准所需执行的工作也不同

D.注册会计师基于自身的预期、判断和个人经验对鉴证对象进行的评价和计量,构成适当的标准

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葡萄糖是青霉素合成的最好碳源。

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