甲醇质子交换膜燃料电池中将甲醇蒸气转化为氢气的两种反应原理是 ①CH3OH(g)

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问题:

甲醇质子交换膜燃料电池中将甲醇蒸气转化为氢气的两种反应原理是

①CH3OH(g)+H2O(g) = CO2(g)+3H2(g)  △H = + 49.0 kJ·mol-1

②CH3OH(g)+1/2O2(g) = CO2(g)+2H2(g) △H =-192.9 kJ·mol-1

下列说法正确的是                                        [ ]

A.CH3OH的燃烧热为192.9 kJ·mol-1

B.反应①中的反应物总能量大于生成物的总能量

C.CH3OH转变成H2的过程一定要吸收能量   

D.根据②推知反应:CH3OH(l)+1/2O2(g)=CO2(g)+2H2(g) 的△H>-192.9 kJ·mol-1

考点:盖斯定律吸热反应、放热反应燃烧热
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When I was going home to India last year, I called up my mother to ask if she wanted anything from china, 

When India had not opened up its markers to the world, I carried suitcase loads of dark glasses and jeans. Thankfully, we can get all these anywhere in India now, 

Still ,her answer surprised me: “Green tea,” 

As long as I can remember she didn’t even drink    Indian tea.  

I dutifully bought a big packet of Longjing and headed home to hear the story. My mother and her brother, both regular newspaper readers, believed that Chinese green tea was the wonder drug for all illnesses 

At the turn of the century, China was not really familiar to the average Indian, It was a strange country 

How things change [And how soon] 

Now every town of any size seems to have a “China Market”. And everyone is talking about China 

The government of India has planned to send a team to China to see how things are done A minister once said that India must open the doors for more foreign investment(投资)and such a step would “work wonders as it did for China”.  

But it’s a two-way street, I just heard about a thousand Shenzhen office workers who have gone to Rangalore to train in software. Meanwhile, all the IT majors are setting up a strong presence in China, 

No wonder that trade, which was only in the millions just ten years ago, is expected to his about us$15 billion for last year and us$20 billion by 2008, a goal set by both governments, 

No wonder, my colleague wrote some weeks ago about this being the Sino-Indian(中印)century as the two countries started on January I the Sino-Indian Friendship Year, 

小题1:But what is still a wonder to me is my mother drinking Chinese tea.

Why did the mother ask for Chinese green tea? 

A.she was tired of Indian tea

B.she had a son working in China.

C.she believed it had a curing effect

D.she was fond of Chinese products,小题2:What does the author mean by “it’s a two-way street’ in paragraph 10? 

A.China and India have different traffic rules

B.Tea trade works wonders in both India and China

C.Chinese products are popular in both China and India,

D.The exchanges between India and China benefit both小题3:hat do we know about the Indian IT industry? 

A.It will move its head office to Shenzhen

B.It is seeking further development in China

C.It has attracted an investment of US$15 billion

D.It caught up with the US IT industry in2008.小题4:In the text the author expresses_____, 

A.his concern for his mother’s health

B.his support for drinking Chinese green tea

C.his surprise at China’s recent development

D.his wonder at the growth of India’s IT industry

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一患者因慢性支气管炎急性发作入住ICU,查血气示pH7.250,PCO85mmHg,AB33mmol/L。诊断为()。

A.失代偿性代谢性酸中毒

B.失代偿性代谢性碱中毒

C.失代偿性呼吸性酸中毒

D.失代偿性呼吸性碱中毒

E.代谢性酸中毒合并呼吸性酸中毒

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全肺切除术的患者术中主支气管已钳夹,但血管尚未处理,此时最重要生理影响是()

A.肺顺应性降低

B.呼吸阻力增加

C.静脉血掺杂

D.血中二氧化碳分压升高

E.通气量降低

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磁力泵外排介质污染环境的介质要用容器盛放,45℃以上介质防止(),液化气防止(),腐蚀性介质防止(),有毒性介质防止()。

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结核分枝杆菌在罗氏培养基上生长速度慢,该菌分裂繁殖一代的最快速度为()。

A.2h

B.4h

C.8h

D.18h

E.10h

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