空竹运动场地的选择应该是?环境?空气?四周?

1．解释说明 2．转折 3．声音的延续

24节竹子?不懂就别乱说啊!24响是可响硬塑的一种,简单来说就是中等型号的可响的硬塑料,软塑都是不能想的,也叫12哑（小型号）,24哑（中等型号）,36哑（专业型号）

　　在我生日的时候,爸爸妈妈送给我一个空竹,从此,它便成为我最好的朋友.
　　我的空竹是由竹子做的,中间是一根木轴,两端各有一个圆盘,每个圆盘四周各有一个大哨口,几个小哨口,空竹拽拉抖动时的响声就是从这些哨口发出的,数一下哨口的数量,算起来我得空竹属于十六响.妈妈说,双轮空竹比单轮空竹容易操作,所以给我挑了一个双轮的.我刚收到这份礼物的时候,以为这是个哑铃,它的样子实在太像哑铃了.除此以外,空竹还配有一根棉线和两根棒.空竹的线,和普通的没有什么区别,两根棒也是竹子做的,大概有我小指那么粗.
　　玩空竹时,先用棉线在空竹的中间绕一圈,左右两手抓住竹棒,让右手靠近空竹,也就是右边的线短,左边的线长,然后快速拽拉右手,左手下压,同时将空竹提起,待左手的线只剩下很短一截时,左手轻轻上拉,右手下压.就这样重复左右手的动作.
　　刚上手时,觉得这玩意儿好难,空竹怎么也上不了那根线,刚抖了几下,就“卟通”掉在了地上.这样重复了N遍,掉了N遍,我的心也凉了N次,但我继续练.终于,功夫不负有心人,空竹在我手中飞快地跑起来,并且还快乐地唱着“嗡－嗡－”的歌.而且,我知道了方法：很快的抽右手,尤其要注意的是只可以一手用力,一手辅助,使空竹向着一个方向转动,如果两手都用力的话,空竹就会和棒打起来.随着双手不停地上下舞动,空竹越转越快,每当这时,我的心别提有多快乐,多骄傲!你瞧!空竹像一个快乐的小精灵在我的指尖飞舞着.
　　我觉得,学习空竹,不仅可以用来锻炼、休闲,还有利于调节手和大脑的协调作用,同时还可以培养我们的恒心.

解题思路：（1）根据题意，先求出购买260个空竹共花多少元，进而用总钱数减去花了的钱数，就是应找回的钱数；
（2）把x=8代入含字母的式子，计算得解．

（1）3000-x×260=3000-260x（元）
（2）当x=8时
3000-260x
=3000-260×8
=3000-2080
=920（元）
答：应找回920元．

点评：
本题考点： 用字母表示数；含字母式子的求值．

考点点评： 此题考查用字母表示数，关键是把给出的字母当做已知数，再根据基本的数量关系列式；也考查了含字母的式子求值的方法．

瀑布上游建起了一座世界上最大的水电站——伊泰普水电站.

庙会.
因为庙会是一次活动,而其他的都是物品.

竹外桃花三两枝
春江水暖鸭先知
（萎蒿满地芦芽短 ）
正是河豚欲上时

1A 2D 3B 4D

Dragon Boat Festival
From Wikipedia,the free encyclopedia
Dragon Boat Festival,often known as Tuen Ng Festival or Duan Wu Festival,is a traditional Chinese festival held on the fifth day of the fifth month of the Chinese calendar.It is also known as the Double Fifth.[citation needed] It has since been celebrated,in various ways,in other parts of East Asia as well,most notably Korea.
The exact origins of Duan Wu are unclear,but one traditional view holds that the festival memorializes the Chinese poet Qu Yuan of the Warring States Period.He committed suicide by drowning himself in a river because he was disgusted by the corruption of the Chu government.The local people,knowing him to be a good man,decided to throw food into the river to feed the fishes to prevent them from eating Qu's body.They also sat on dragon boats,and tried to scare the fishes away by the thundering sound of drums aboard the boat and the fierce looking dragon-head in the front of the boat.
In the early years of the Chinese Republic,Duan Wu was also celebrated as "Poets' Day",due to Qu Yuan's status as China's first poet of personal renown.
Today,people eat zongzi (the food originally intended to feed the fishes) and race dragon boats in memory of Qu's dramatic death.
可以自己去 Google.com in English 找
希望有用

虚怀若谷： xū huái ruò gǔ
解 释：谷：山谷.胸怀像山谷一样深广.胸襟宽大得像山谷一样.形容非常谦虚,能容纳很多意见.
出 处： 先秦·李耳《老子》：“敦兮其若朴,旷兮其若谷.”

解释说明.你们老师才讲到第六课吗?