随着环保意识的增强,清洁能源越来越受人们关注。 (1)甲烷是一种洁净能源,已知:

题型:填空题

问题:

随着环保意识的增强,清洁能源越来越受人们关注。

(1)甲烷是一种洁净能源,已知:

CH4(g)+2O2(g)=CO2(g)+2H2O(g) △H=-802.3 kJ/mol

H2O(l)=H2O(g) △H=+44 kJ/mol

则4.8 g甲烷气体燃烧生成液态水放出的热量为_________________

(2)利用甲烷与水反应制备氢气,因原料价廉产氢率高,具有实用推广价值,已知该反应为:

CH4(g) +H2O(g)=CO(g) +3H2(g) △H=+206.1 kJ/mol

①若800℃时,反应的平衡常数K1=1.0,某时刻测得该温度下,密闭容器中各物质的物质的量浓度分别为:c(CH4)=3.0 mol/L;c(H2O)=8.5 mol/L;c(CO)=2.0 mol/L;c(H2) =2.0 mol/L,则此时正逆反应速率的关系是___(填序号)。

A.v正>v逆 B.v正<v逆 C.v正=v逆 D.无法判断 

②若将温度降至600℃,此时平衡常数为K2,则K1 ___K2(填“>”、“<”或“=”)。 

(3)利用MnFe2O4作催化剂,通过两步反应可将水分解制得H2,第一步反应为:

MnFe2O4MnFe2O4-x+x/2_______

则框内物质为:_____________,第二步反应方程式为:________________________

考点:基元反应、非基元反应化学平衡常数化学反应热的计算
题型:填空题

下列位置中,哪一项是双肾区前后位摄影时中心线射入点( )。

A.剑突
B.脐上3cm
C.剑突与脐连线中点
D.剑突下3cm
E.脐

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特里芬在《黄金与美元危机》一书中指出:一国的国际储备额应同其进口额保持一定的比例关系,这个比例关系的最高限与最低限应该分别是()

A、40%和20%

B、30%和25%

C、25%和30%

D、20%和40%

题型:填空题

阅读下面文字,完成小题

(二)画眉(9分)

八月的一天下午,天气暖洋洋的,一群小孩在十分卖力地捕捉那些色彩斑斓的蝴蝶,我不由自主地想起童年时代发生的一件印象很深的事情。那时我才十二岁,住在南卡罗来纳州,常常把一些野生的活物捉来放到笼子里,而那件事发生后,我这种兴致就被抛得无影无踪了。

我家在林子边上,每当日落黄昏,便有一群美洲画眉鸟来到林间歇息和歌唱。那歌声美妙绝伦,没有一件人间的乐器能奏出那么优美的曲调来。

我当机立断,决心捕获一只小画眉,放到我的笼子里,让她为我一人歌唱。

果然,我成功了。她先是拍打着翅膀,在笼中飞来扑去,十分恐惧。但后来她安静下来,承认了这个新家。站在笼子前,聆听我的小音乐家美妙的歌唱,我感到万分高兴,真是喜从天降。

我把鸟笼放到我家后院。第二天,她那慈爱的妈妈口含食物飞到了笼子跟前。画眉妈妈让小画眉把食物一口一口地吞咽下去。当然,画眉妈妈知道这样比我来喂她的孩子要好得多。看来,这是件皆大欢喜的好事情。

接下来的一天早晨,我去看我的小俘虏在干什么,发现她无声无息地躺在笼子底层,已经死了。我对此迷惑不解,不知发生了什么事,我想我的小鸟不是已得到了精心的照料吗?

那时,正逢著名的鸟类学家阿瑟•威利来看望家父,在我家小住,我把小可怜儿那可怕的厄运告诉了他,听后,他作了精辟的解释:"当一只母美洲画眉发现她的孩子被关进笼子后,就一定要喂小画眉足以致死的毒莓,她似乎坚信孩子死了总比活着做囚徒好些。"

从此以后,我再也不捕捉任何活物来关进笼子里。因为任何生物都有对自由生活的追求,而这种追求无疑是值得肯定的。

小题1:第一自然段中有句话:而那件事发生后,我这种兴致就被抛得无影无踪了。(2分)

“那件事”是指                                                       

“这种兴致”是指                                                     

小题2:“我”为什么要捕捉一只小画眉放到笼子里?请你评价一下这种做法。(3分)

小题3:匈牙利诗人裴多菲有首诗:生命诚可贵,爱情价更高。若为自由故,二者皆可抛。文中哪些语言与此意思相近?(2分)

小题4:、读了这篇文章,你最大的感悟是什么?(用文中原句回答)(2分)

题型:填空题

Meeting people from another culture can be difficult. From the beginning, people may send the wrong signal (信号). Or they may pay no attention to signals from another person who is trying to develop a relationship.

Different cultures emphasize (强调) the importance of relationship building to a greater or lesser degree. For example, business in some countries is not possible until there is a relationship of trust. Even with people at work, it is necessary to spend a lot of time in "small talk", usually over a glass of tea, before they do any job. In many European countries -- like the UK or France -- people find it easier to build up a lasting working relationship at restaurants or caf6s rather than at the office.

Talk and silence may also be different in some cultures. I once made a speech in Thailand. I had expected my speech to be a success and start a lively discussion; instead there was an uncomfortable silence. The people present just stared at me and smiled. After getting to know their ways better, I realized that they thought I was talking too much. In my own culture, we express meaning mainly through words, but people there sometimes feel too many words are unnecessary.

Even within Northern Europe, cultural differences can cause serious problems. Certainly, English and German cultures share similar values; however, Germans prefer to get down to business more quickly. We think that they are rude. In fact, this is just because one culture starts discussions and makes decisions more quickly.

People from different parts of the world have different values, and sometimes these values are quite against each other. However, if we can understand them better, a multicultural environment (多元文化环境) will offer a wonderful chance for us to learn from each other.

小题1:In some countries, eating together at restaurants may make it easier for people to _______.

A.develop closer relations

B.share the same culture

C.get to know each other

D.keep each other company小题2:The author mentions his experience in Thailand to show that _________.

A.the English prefer to make long speeches

B.too many words are of no use

C.people from Thailand are quiet and shy by nature

D.even talk and silence can be culturally different小题3:According to the text, how can people from different cultures understand each other better?

A.By sharing different ways of life.

B.By accepting different habits.

C.By recognizing different values.

D.By speaking each other' s languages.小题4:What would be the best title for the text?

A.Multicultural Environment.

B.Cross-Cultural Differences.

C.How to Understand Each Other.

D.How to Build Up a Relationship.

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多层民用建筑、地上多层汽车库、高层民用建筑的裙房同时使用1支水枪的单建式人防工程的消火栓最大间距为( )。

A.30m

B.40m

C.50m

D.55m

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