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4. 已知1 g氫氣完全燃燒生成水蒸氣時放出熱量121 kJ，且氧氣中1 mol O=O鍵完全斷裂時吸收熱量496 kJ，水蒸氣中1 mol H-O鍵形成時放出熱量463 kJ，則氫氣中1 mol H-H鍵斷裂時吸收熱量為(　　 )

A.920 kJ　　 B. 557 kJ　　 C.436 kJ　　 D.188 kJ

2. 右圖是一個一次性加熱杯的示意圖。當水袋破裂時，水與固體碎塊混和，杯內(nèi)食物溫度逐漸上升。制造此加熱杯可選用的固體碎塊是

A．硝酸銨　 B．生石灰C．氯化鎂　 D．食鹽

3灰錫(以粉末狀存在)和白錫是錫的兩種同素異形體。

已知：①Sn(s、白)+2HCl(aq)＝SnCl₂(aq)+H₂(g)；DH₁

②Sn(s、灰)+2HCl(aq)＝SnCl₂(aq)+H₂(g)；DH₂

③Sn(s、灰)Sn(s、白)；DH₃＝+2.1 kJ/mol

下列說法正確的是(　　 )

A.DH₁＞DH₂

B.錫在常溫下以灰錫狀態(tài)存在

C.灰錫轉(zhuǎn)化為白錫的反應(yīng)是放熱反應(yīng)

D.錫制器皿長期處于低于13.2 ℃的環(huán)境中，會自行毀壞

1．以節(jié)能減排為基礎(chǔ)的低碳經(jīng)濟是保持社會可持續(xù)發(fā)展的戰(zhàn)略舉措。下列做法違背發(fā)展低碳經(jīng)濟的是

A．盡量用純液態(tài)有機物代替水作溶劑

B．限制塑料制品的使用

C．提高原子利用率，發(fā)展綠色化學(xué)

D．發(fā)展氫能和太陽能

　It was the night before the composition was due.As I looked at the list of topics(題目)，“The Art of Eating Spaghetti(意大利面條)” caught my eye.The word “spaghetti” brought back the 　1　of an evening at Uncle Alien's in Belleville when all of us were seated around the table and Aunt Pat　2　spaghetti for supper.Spaghetti was an exotic(外來的)treat in　3　days.Never had I eaten spaghetti，and 　4　of the grown­ups had enough experience to be　5　it.What laughing arguments(爭論)we had about the　6　respectable method for moving spaghetti from plate to mouth.　7　，I wanted to write about that，but I wanted to　8　it down simply for my own　9　，not for Mr.Fleagle，my composition teacher.As for him，I would write something else.

When I finished it the night was half gone and there was no　10　left to write a proper composition for Mr.Fleagle.There was no choice next morning but to　11　my work.Two days passed before Mr.Fleagle returned the graded papers.He said，“Now，class，I want to read you a composition，‘The Art of Eating Spaghetti’.”

My words！He was reading my words out 　12　to the whole class.　13　laughed，then the whole class was laughing with open­hearted enjoyment.I did my best not to show 　14　，but what I was feeling was pure happiness，for my words had the power to make people　15　.

1.A.memory　　　　　B.thought

C.knowledge　　　　　　 　D.experience

解析：bring back one's memory的含義為“喚起某人對某事的回憶”。

答案：A

2.A.cooked 　　　　　　　　　　B.served

C.got 　　　　　　　　　　　D.made

解析：serve sth.此處的含義為“端上(飯菜等)”。

答案：B

3.A.their　 　　　　　　　　　　B.past

C.last　 　　　　　　　　　　D.those

解析：in those day的含義為“當時，在那些日子里”。

答案：D

4.A.none　 　　　　　　　　　B.one

C.each　 　　　　　　　　　her

解析：根據(jù)上下文可知，沒有人知道如何吃這種東西，所以用none。

答案：A

5.A.careful about 　　　　　　　　　　B.good at

C.fond of　 　　　　　　　　　　　　D.interested in

解析：be good at “在……方面內(nèi)行”。

答案：B

6.A.nearly　 　　　　　　　　　　　　B.naturally

C.officially 　　　　　　　　　　　D.socially

解析：nearly “幾乎，接近”；naturally “自然地”；officially “官方地，正式

地”；socially “被社會所接受地”。

答案：D

7.A.Especially 　　　　　　　　　　B.Probably

C.Suddenly 　　　　　　　　　D.Fortunately

解析：想到這兒，作者突然想把這件事寫下來。

答案：C

8.A.settle　 　　　　　　　　　　　B.put

C.bite 　　　　　　　　　　　D.let

解析：put down＝write down，意為“寫下”。

答案：B

9.A.work　 　　　　　　　　　　　　　B.story

C.luck 　　　　　　　　　　　　　D.joy

解析：根據(jù)上下文，作者寫這篇文章不是為了完成老師所布置的作業(yè)，而是出于好玩

(joy)。

答案：D

10.A.time 　　　　　　　　　　　　　B.excuse

C.way　 　　　　　　　　　　　　D.idea

解析：由上文the night was half gone可以作出判斷。

答案：A

11.A.give up　 　　　　　　　　　　　　tinue

C.hand in　 　　　　　　　　　　　　D.delay

解析：hand in意為“交(作業(yè))”。

答案：C

12.A.loud 　　　　　　　　　　　　　　B.fast

C.publicly　 　　　　　　　　　　　D.calmly

解析：此處用大聲地(loud)符合語境。

答案：A

13.A.People 　　　　　　　　　　　　　B.Nobody

C.Somebody　　　　　　　　　　 　D.I

解析：根據(jù)語境，采用排除法可得到答案。

答案：C

14.A.shock 　　　　　　　　　　　　　B.wonder

C.worry 　　　　　　　　　　　　　D.pleasure

解析：自己的文章被老師在課堂上朗讀，作者自然會很高興，但此時作者盡力使自己

不喜形于色。

答案：D

15.A.excited 　　　　　　　　　　　　　B.satisfied

C.think　　　　　　　　　　　　　 　D.laugh

解析：由上文可得到答案。

答案：D

(2010·深圳二模)When I was a ten­year­old girl，I was once asked to deliver a speech titled“A Real Test in My Life”.To talk before the whole class！Just imagine how 　1　(terrible) shy I was the moment I thought of that with so many eyes fixed upon me.I had no other 　2　(choose)，though.First I was to draft the speech and that was just a piece of cake for me，because I was a good writer-something to pride myself in.But the hard part 　3　(lie) in my oral presentation；to read from 　4　paper was not allowed；I had to give the speech 　5　my memory and in front of such a big audience！A real trial began when I stood on the platform with my legs 　6　(tremble) and my mind blank.How much time had passed by，I didn't know.My listeners were still waiting，patiently and without any signs of rushing me.Gradually I found 　7　back，giving out my speech with difficulty.Finally I finished.After 　8　seemed to be a hundred years，I found my audience applauding.I made it！From then on，my fear of talking before an audience disappeared.Actually with my confidence building 　9　，I now turn out to be a great speaker.Looking back，I know the greatest difficulty on our way to success is our fear；overcome it，　10　 we will be able to achieve our goals.

答案：1.terribly　2.choice　3.lay　4.the　5.from　6.trembling　7.myself　8.what　9.up　10.and