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5．句子翻译
1) 快点，否则你就要迟到了。(else)
2) 老师鼓励我们多练习。(encourage)
3) 我们都羡慕他的新汽车。(envy)
4) 其他星球上有生命吗?(exist)
5) 语言无法表达我高兴的心情(express).
6) 他未能履行诺言.(fail)
7) 不要让婴儿受到阳光的照射.(expose)
8) 价格降低了15%.(fall)
9) 不要对我期望过高.(expect)
10) 城里到处有炸弹爆炸.(explode)
第10课时
(favorite --- fundamental)
4．选词填空
examine exit export evidence fare
fade fall explore enjoyable essay
1) When we camped in the sands, it grew colder as night ______________.
2) The Canadian visitors decided to ___________ Beijing by bike.
3) Many teachers think games can make learning more __________.
4) A one-week holiday in Majorca costs $779 including air ___________.
5) An __________ differs in form from a poem.
6) Do you have ________ that this treatment works? I doubt it.
7) Experts who _________ the painting believe it is real.
8) An emergency ___________ is a special door used only when there is a fire.
9) Wheat is one of the country’s chief _________ and is mostly sold to Asian countries.
10) Over the years the green paint had __________.
3. 单项选择
1) Your choice may make a difference in _________ life.
A. someone else B. someone else’s C. else someone D. someone’s else
2) The experts suggest that the new teaching methods be ______ in the classroom.
A. employed B. equipped C. existed D. favored
3) How do you enjoy ______ your weekend?
A. spend B spending C. to spend D. are spending
4) The woman _______ politics in 1996, and two years later she was made president.
A. entered B. explored C. excited D. envied
5) He ______ death in the car accident.
A. escaped narrow B. narrowly escaped C. escaped extremely D extremely escaped
6) Families, ______ those with young children, benefit form the program.
A. equally B especially C fairly D extraordianrily
7) --- You hate Jim, don’t you?
--- __________. I just think he’s a bit annoying, that’s all.
A. That’s it B. It’s up to you C. No way D Not exactly
8) The rich woman had nothing to do except ______ money.
A. spend B. spending C. spent D. to spend
9) He’s never tried to hide the fact _______ he spent time in prison
A. how B. whether C. that D. /
10) Do you expect ______ to be a chance that you can go abroad for further education?
A. it B. what C. when D. there
2. 介词填空
1) Nowadays many marriages end ________ divorce.
2) The managers are enthusiastic _____ the new plan.
3) A pint is equal _____ about half a liter.
4) The classrooms are equipped ____ modern teaching facilities.
5) Her courage is an example _______ us all.
6) Please excuse me _______ being so late again?
7) Could you explain the rules ______ me again?
8) I’m not really familiar ______ her poetry, sorry to say.
9) He failed ________ his attempt to cross the desert.
10) Most of the members spoke _______ favor of the new plan.
1．单词拼写
1) He was trying to e____________ me by asking me questions I couldnn’t answer.
2) In an e____________, dial 911 for police, the fire department or an ambulance.
3) You should check all your electrical e_________ regularly.
4) Recycling paper and caans is a easy way to protect the e____________.
5) She tored open the e________ and frantically read the letter.
6) Clothes, the e____________(皇帝) thought, made him what he was.
7) The e________ was unable to explain why the cars were to slow.
8) To my surprise, many police were standing at the main e_______ to the school.
9) It’s your f____________ (过错) that we’re late.
10) The e____________(展览) of works by the new painter opens next week.
3．程序语言
程序语言是将自然语言和框图所表达的解决问题的步骤用特定的计算机所识别的低级和高级语言编写而成。特点：能在计算机上执行，但格式要求严格。
程序框图
描述算法可以用不同的方式。例如：可以用自然语言和数学语言加以叙述，也可以借助形式语言(算法语言)给出精锐的说明，也可以用程序框图直观的显示算法全貌。
1．自然语言
自然语言就是人们日常使用的语言，可以是人之间来交流的语言、术语等，通过分步的方式来表达出来的解决问题的过程。
其优点为：好理解，当算法的执行都是先后顺序时比较容易理解；
缺点是：表达冗长，且不易表达清楚步骤间的重复操作、分情况处理现象、先后顺序等问题。
2．累加变量的值初始值一般取成0，而累乘变量的初始值一般取成1。
例10．相传古代的印度国王要奖赏国际象棋的发明者，问他需要什么。发明者说：陛下，在国际象棋的第一个格子里面放1粒麦子，在第二个格子里面放2粒麦子，第三个格子放4粒麦子，以后每个格子中的麦粒数都是他前一个格子中麦粒数的二倍，依此类推(国际象棋棋盘共有64个格子)。请将这些麦子赏给我，我将感激不尽。国王想这还不容易，就让人扛了一袋小麦，但不到一会儿就没了，最后一算结果，全印度一年生产的粮食也不够。国王很奇怪，小小的“棋盘”，不足100个格子，如此计算怎么能放这么多麦子？试用程序框图表示一下算法过程。
解析：将实际问题转化为数学模型，该问题就是来求
的和
点评：对于开放探究问题，我们可以建立数学模型(上面的题目要与等比数列的定义、性质和公式联系起来)和过程模型来分析好算法，通过设计算法以及语言的描述选择一些成熟的办法进行处理。像上面应用到了等比数列的通项公式和前n项和公式。
