UnitOne:词汇与表达解答关键

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"Key to Some Exercises_U1" 本资源是一份针对Unit One的学习材料,主要目的是帮助学生复习和巩固在该单元中所学的语言知识,包括词汇、短语及其用法。通过完成练习,学生可以提升对语言的敏感度和应用能力。 1. **Words in Action** 部分: 这部分的练习旨在让学生使用本单元学习的新词汇来完成句子。例如,用"spark"(激发)替换适当的词来完成句子,或者使用"compelled"(被迫)来表达被迫做某事的情况。其他如"bare"(光秃秃的)、"scrape"(刮擦)、"destruction"(破坏)、"output"(产量)、"retreat"(撤退)、"tipped"(倾斜)、"miracle"(奇迹)、"eternal"(永恒的)、"pile"(堆积)、"transfer"(转移)、"mass"(大量)、"thereby"(因此)、"have emerged"(出现)、"trigger"(触发)、"threaten"(威胁)、"consumed"(消耗)、"hollow"(空洞的)等词,都是为了让学生熟悉并能准确运用这些词汇。 2. **Expressions in Action** 部分: 这一部分的练习关注的是短语的应用。例如,使用"show signs of"(显示出...的迹象)来完成句子,或用"cope with"(应对)来表达处理困难的能力。其他短语如"lives in fear of"(生活在恐惧中)、"tough it out"(挺过去)、"cut down"(减少)、"from head to foot"(从头到脚)、"searched out"(找出)、"nothing short of"(无异于)、"as yet"(至今)、"settle in"(安顿下来)、"take heart"(鼓起勇气)等,旨在让学生掌握这些常用表达,并能在实际语境中正确使用。 3. **Increasing Your Word Power** 部分: 这部分练习旨在提高学生的词汇辨析能力。学生需要理解每组相似但用法不同的词,如"temptation"(诱惑)与"attraction"(吸引力),"chance"(机会)与"opportunity"(机遇),"states"(状态)与"conditions"(条件)等。通过填写合适的词,学生能够更深入地理解这些词汇在不同语境中的细微差别。 这份资源提供了一套全面的练习,帮助学生复习和巩固Unit One的词汇和短语,强化他们的语言运用能力,以期达到提升语言综合水平的目标。学生应积极参与这些练习,以确保对所学内容的掌握并能够在实际交流中灵活运用。

用c++和segment tree解决下述问题Doing Exercises 描述 As we all know, the lines of students doing exercises between classes are always unsatisfactory to teachers. Today, a teacher wants to require something new. Firstly, he lets some students of N classes correspondingly form n lines. Then, he randomly selects a class to add some of its remaining students to its line, or selects a class to let some students leave its line, or lets the monitors from some adjacent classes report the total number of students in all these classes. This is very annoying for the monitors. Can you write a program to help them complete the reporting task? 输入 The first line is an integer T (T<50), the number of test cases. For each test case, its first line is an integer N (1<=N<=50000), representing the number of classes, and its second line include N integers (a1, a2, a3, ... , an), and ai (1<=ai<=100) means the number of students in the line of class i at the beginning. Then, each next line will be an order. There are 4 kinds of orders: (1) "Add x i" means adding x students to the line of class i; (2) "Sub x i" means that x students leave the line of class i; (3) "Query i j" means that the monitors from class i to class j report the teacher the total number (sum) of students in their classes at that moment (i<j); (4) "End" means ending the exercises, which will only appear at the end of each test case. The number of orders will not exceed 40000. The number of students in any line will never below 0. 输出 For each test case, you must print "Case i:" in the first line. Then for each Query, print the result in one line.

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