（李响同学拿来一只定值电阻）李响同学拿来一只定值电阻,但不知其阻值他便找来了以下器材：开关3只,电源,滑动变阻器,电阻箱

王月设答对X道,则答错(20-X)道
8X-5(20-X)=134
8X-100+5X=134
13X=234
X=18
设李响答错X道,答对(20-X)道
8(20-X)-5X=139
160-8X-5X=139
13X=21
X=21/13
P.S第二问的数字是不是打错了?
不可能出现分数啊

3、陈伟5,王仪4,王明3,李阳0,李响-1,赵刚-3,苏明-5；
4、答对了15道题得分15*5=75,答错5道题扣分-3*5=-15,总分60分；
5、成绩分别为：83,90,80,86,78,75,平均分82
6、总行驶里程119公里,耗油119a升（不论方向,均应用加法）

It is important that we cannot eat snacks during lectures,because it will influence not only the one eating,but also the teacher and other students.
蛮重要的是我们不能在上课的时候吃零食,因为这样不仅会影响吃东西的人,而且还会影响老师和其他同学.
We should never fight.
我们永远不能打架.
And we are not allowed to sleep when there is a lecture going on.
我们在课堂上不允许睡觉.
If any of the above rules is violated,the corresponding student will be asked to clean the classroom in a particular day,or to have PE canceled and study in the classroom during the course.
如果以上任意一条规则被违反,对应的学生将会被要求在某天打扫教室,或者取消体育课并在期间呆在教室里学习.

We all want to grow up happily and healthily, and for this goal we must do several things.
Firstly, we should develop a positive attitude towards life. Life consists of not only sunshine but also hard times. We should be brave when faced with difficulties.
Secondly, we must study hard because knowledge is power. If we have the power, we can contribute to building our country and at the same time enjoy a better life.
Maintaining a healthy body is fundamental to leading a fulfilling, successful life. The secret to a healthy body is regular exercise and a balanced diet combined.

Dear editor ,
Glad to have your news. My name is Li Xiang who is a fan of English Cub and longing for joining in this big cub. I have learned English for mang years and I have a good command of it .Since I was a child ,I fell in love with it .But ,I desert to be a member of English Cub so as to make more progress .What I want to know is how to join , how much does it cost per year and how often does it hold its activities.I am looking forward to your news.
yours,
Li Xiang

看一本连环画,第一天看了全书的五分之一,第二天看了39页,这时正好看了全书的一半.第三天应从哪一页看起?
39/(1/2-1/5)=39/(3/10)=130(页）
130*（1/2）+1=66(页）
应从第66页看起.

解题思路：声音的特征有三个：响度、音调、音色．响度指声音的大小，音调指声音的高低，音色是指声音的品质与特色．据此来分析解答．

不同人的声带结构和发声部位特征不同，发出的音色不同，因此当听到“想都不用想…”的话音时，就知道是主持人李响的声音，是根据声音的音色来判断的．
音响系统使每一位观众都能听到歌星的演唱，是音响系统增加了声音的响度．
故答案为：音色；响度．

点评：
本题考点： 音调、响度与音色的区分．

考点点评： 本题考查学生对音色、响度定义的理解程度，属于基础题，难度不大．

"琼琼!对李响说明天她就要转学了."
琼琼对李响说,明天她就要转学了.

0.18×30+60÷60×5=10.4千米
李响从家到新华书店的距离是10.4千米

琼琼对李强说,他明天就要转学了.
他说得对,你说的错了.

24*2=12,63*3=21,44*4=11.李响踢的个数最多

(1)琼琼对李响说明天她就要转学了.
A.琼琼对李响说,明天她就要转学了.【琼琼要转学】
B.琼琼对李响说：“明天她就要转学了.”【一个女同学要转学】
C.--------------------------------.【这第三种实在加不出来了!】
(2)他说的对你说的错了.
A.他说的对,你说的错了.
B.他说的,对你说的错了.
C.他说的对,你说的错了?
愿对你有所帮助!

王明用时是：12小时,速度5KM/h,路程：12*5=60KM
张丽路程一样,也是60KM,她用时是：10小时,所以她的速度是：60/10=6KM/h
假设李响出发X小时张丽追上他,那么张丽用时是X-2小时
因此：4*x=6*(x-2)
计算结果为X=6
所以张丽是12点追上李响的
不知你是否满意答案

解设：有x个小朋友.
X＋X/2＋X/3＋1＝100
解得：X=54
答：有54个小朋友参加这次环保活动.