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4.用铂电极电解CuSO4溶液,当铜离子浓度降至一半时,停止通电,若使CuSO4溶液恢复原浓度、原体积,应加入的适量适当物质是              (    ) A.CuSO4       B.CuSO4·5H2O    C.CuO       D.Cu(OH)2

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3.在101kPa和25℃时,热化学方程式:H2(g) + 1/2O2(g) =H2O(g);△H=-241.8kJ/mol,H2(g) + 1/2O2(g) =H2O(1);△H=-285.8kJ/mol。下列说法中错误的是:    (    )

A.H2燃烧生成1molH2O(g)时,放出241.8kJ的热量  

 B.H2的燃烧热为285.8kJ

C.O2 前面的1/2表示参加反应的O2的物质的量    

D.1mol液态水变成水蒸气时吸收44kJ的热量

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2.已知H+(aq)+OH(aq)=H2O(l);△H=-57.3 kJ/mol。若向三份等体积、等物质的量浓度的NaOH溶液中分别加入:①稀醋酸;②浓硫酸;③稀硝酸至恰好完全反应,并将上述过程中放出的热量分别记为Ql、Q2、Q3。下列关系式中正确的是     (    )

A.Q1<Q3<Q2       B.Ql<Q2<Q3     C.Q1<Q2=Q3       D.Q1=Q2=Q3

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1.下列反应中,属于氧化还原反应同时又是吸热反应的是          (    ) A.Ba(OH)2·8H2O与NH4Cl反应    B.铝与稀盐酸反应 C.灼热的炭与CO2反应        D.甲烷与O2的燃烧反应

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3.词义辨析

7) Now he can no longer walk and he must sit quietly in a chair all day. Even talking is (1) . One night, I went to visit him with my sister. We started (2) about life, and I told them about one of my (3) . I said that we must very often give things up (4) we grow---our youth, our beauty, our friends---but it always (5) that after we give something up, we gain something new in its place.  (06北京高考)

(1) A. impossible        B. difficult      C. stressful     D. hopeless

(2) A. worrying        B. caring     C. talking    D. asking

(3) A. decisions         B. experiences      C. ambitions      D. beliefs

(4) A. as           B. since      C. before     D. till

(5) A. suggests       B. promises        C. seems       D. requires

完形答案 (一)DBABC D (二)1. CC BD C 2. ACB 3. BCBAC

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2. 注意习惯搭配

5) The chance passed and I didn’t __50__ it. I sat the exam the next day and I won. I didn’t __51__ to cheat, but I was still cheating anyhow.  (06江苏高考)

(50) A. take              B. have           C. lose              D. find

(51) A. remember          B. learn          C. mean        D. pretend

6) Life is filled with challenges. As we got older we __1__ realize that those challenges are the very things that __shape__ us and make us who we are,…  (07山东高考)

A. seem to    B. come to   C. hope to   D. try to

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46. A. restaurant    B. washroom        C. office             D. kitchen

(二)1. 联系上下文语境

1) Traveling west, you set your clock __1__ ; traveling east, you set it ahead.

    A behind     B. forward                C. back    D. ahead

2) Many old people don’t have good __2__. They can’t watch TV, but they can listen to the music.

   A. hearing   B. health    C. eyesight   D. time

3)My family was  43  . We paid our debts. But before harvest, cash was short. Would the store owner  44  us ?  (2006 山东高考)

(43) A. generous     B. honest         C. friendly    D. modest

(44) A. blame      B. excuse        C. charge       D. trust

4) Carolyn Stradley is the founder of C&S Paving Inc. (铺路公司) in Atlanta, USA. In the following account, she recalls the job that challenged her __1__ and skill but left her flying high. …

“The key to our success was having the __courage__ to take on any job and then being creative in our approach to getting it done.” (07江苏高考)

(1) A. kindness     B. patience    C. imagination    D. experience

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45. A. true      B. hopeful         C. clear          D. possible

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44. A. the waiter    B. time         C. I           D. the dinner

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43. A. chatted with   B. looked at        C. laughed at        D. talked about

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