鸟巢的占地面积约为20公顷,几个鸟巢的占地面积约为1平方千米

3121129762022-10-04 11:39:541条回答

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j7510 共回答了19个问题 | 采纳率89.5%
1平方千米等于1500亩=100公顷,所以5个鸟巢为一平方千米
1年前

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Beijing National Stadium (Bird's Nest/Olympic Stadium)
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Broke ground Dec 2003
Opened Unknown
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Architect Herzog & de Meuron
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解题思路:通过在160秒时间内,照片上模糊部分的宽度是△L即为发生的位移,从而由位移与时间的比值来确定冲刺速度.

从照片可得,胸前号码布上模糊部分的宽度是△L
照片后测得照片中人高度为h,博尔特的高度为H,所以冲刺时[1/60]秒内的位移是
H
h△L.
再由位移与时间的比值可得冲刺速度为
60H
h△L
故答案为:
H
h△L,
60H
h△L.

点评:
本题考点: 匀速直线运动及其公式、图像.

考点点评: 由于时间之短,则可由平均速度来表示瞬时速度.同时可由模糊部分,也可说成影子来确定曝光时间内的位移.

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1,8:7 调整后6:9=2:3
150*(3+2)=750 750÷(8+7)=50 50*8=400 50*7=350
2,60*15=900 900*4=3600 3600÷(40*15)=6
举世瞩目的第29届奥运会于2008年8月8日在北京“鸟巢”体育馆开幕,奥运会吉祥物“福娃”活泼可爱,如图是福娃在几个项目
举世瞩目的第29届奥运会于2008年8月8日在北京“鸟巢”体育馆开幕,奥运会吉祥物“福娃”活泼可爱,如图是福娃在几个项目中的运动形象,下列几种说法正确的是(  )

A.用力踢足球,足球会飞出去,说明力能使物体运动状态发生改变
B.投篮球时,篮球脱手后地球对篮球有力的作用,篮球对地球没有力的作用,所以篮球落到地上
C.击出的羽毛球能在空中继续飞行,是由于羽毛球具有向前的冲力
D.用桨向后划水时皮划艇会向前进,这是由于力的作用是相互的
点点凡星1年前1
tcm00686 共回答了18个问题 | 采纳率94.4%
A、用力踢足球时,由于人对足球施加的力,使物体的运动状态发生了改变;故A正确;
B、重力在任何情况下都存在,故B错误;
C、羽毛球在空中飞行时,是由于本身的惯性保持了原来的速度,不是因为具有向前的冲力;故C错误;
D、力的作用是相互的,故桨对水有力时,水对桨也会产生力的作用,从而推动皮划艇前进;故D正确;
故选:AD.
在“2008北京”奥运会国家体育场的“鸟巢”钢结构工程施工建设中,首次使用了我国科研人员自主研制的强度为4.6×108帕
在“2008北京”奥运会国家体育场的“鸟巢”钢结构工程施工建设中,首次使用了我国科研人员自主研制的强度为4.6×108帕的钢材,那么4.6×108的原数为(  )
A. 4 600 000
B. 46 000 000
C. 460 000 000
D. 4 600 000 000
aa追逐南风1年前2
Aceagle409 共回答了13个问题 | 采纳率92.3%
解题思路:可以把4.6的小数点向右移动8位.

4.6×108=460 000 000.
故选:C.

点评:
本题考点: 科学记数法—原数.

考点点评: 用科学记数法表示的数还原成原数时,n>0时,n是几,小数点就向右移几位.

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2.“似乎”表示不确定,有意引出下文.
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4.2/(1-22%)
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这两个句子哪个词语使用不当A.“鸟巢”里垃圾如山,实在令人叹为观止!(叹为观止)B.这个修女救助孤儿、失学儿童,这种悲天
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二选一- -
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钢铁是重要的金属材料,在生产、生活中有广泛的用途.建造北京奥运会主体育场“鸟巢”,就是用了大量的钢铁.
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戴名世的《鸟说》中的加点字解释 1即而视之(即):2则二鸟巢于其枝干之间(巢):3雏且出矣(且):4辄息于屋上(辄)还有
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3雏且出矣(且):
4辄息于屋上(辄)
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[道理] 
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(2009•上城区一模)在2008年北京奥运会国家体育场的“鸟巢”钢结构工程施工建设中,首次使用了我国科研人员自主研制的
(2009•上城区一模)在2008年北京奥运会国家体育场的“鸟巢”钢结构工程施工建设中,首次使用了我国科研人员自主研制的强度为4.58亿帕的钢材.4.58亿帕用科学记数法表示为(  )帕.
A.4.58×106
B.4.58×107
C.4.58×108
D.4.58×109
蓝色未央1年前1
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解题思路:科学记数法的表示形式为a×10n的形式,其中1≤|a|<10,n为整数.
确定n的值时,要看把原数变成a时,小数点移动了多少位,n的绝对值与小数点移动的位数相同.
当原数绝对值大于10时,n是正数;当原数的绝对值小于1时,n是负数.

把4.58亿帕转化成科学记数法的表示形式为4.58×108帕.故本题选C.

点评:
本题考点: 科学记数法—表示较大的数.

考点点评: 本题考查用科学记数法表示较大的数.科学记数法在实际生活中有着广泛的应用,给我们记数带来方便,考查科学记数法就是考查我们应用数学的能力.

如图,在2008年8月16日,牙买加选手尤塞恩-博尔特在国家体育场“鸟巢”进行的北京奥运会男子100米决赛中以9秒69的
如图,在2008年8月16日,牙买加选手尤塞恩-博尔特在国家体育场“鸟巢”进行的北京奥运会男子100米决赛中以9秒69的成绩夺得金牌并打破9秒72的世界纪录.设高度为H的博尔特正在进行100m短跑就要到达比赛的终点处,有一摄影记者用照相机拍摄下了运动员冲刺的一幕.已知摄影记者使用的照相机的光圈(控制进光量的多少)是16,快门(曝光时间)是[1/60]s,得到照片后测得照片中人高度为h,胸前号码布上模糊部分的宽度是△L.则由以上数据可以知道牙买加选手尤塞恩-博尔特100米决赛冲刺时[1/60]s内的位移大小为
[H/h△L
nouchao1 1年前 已收到1个回答 举报
nouchao11年前1
peachhill 共回答了16个问题 | 采纳率93.8%
解题思路:通过在160秒时间内,照片上模糊部分的宽度是△L即为发生的位移,从而由位移与时间的比值来确定冲刺速度.

从照片可得,胸前号码布上模糊部分的宽度是△L
照片后测得照片中人高度为h,博尔特的高度为H,所以冲刺时
1
60]秒内的位移是
H
h△L.
再由位移与时间的比值可得冲刺速度为
60H
h△L
故答案为:
H
h△L,
60H
h△L.

点评:
本题考点: 匀速直线运动及其公式、图像.

考点点评: 由于时间之短,则可由平均速度来表示瞬时速度.同时可由模糊部分,也可说成影子来确定曝光时间内的位移.

我去北京观了故宫,颐和园,天坛,鸟巢和水立方等名胜古迹.修改病句
Algeryang1年前1
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病因:归类不当(“鸟巢”和“水立方”不属于名胜古迹,应该属于现代工程)故,应改为:我去北京参观了故宫、颐和园和天坛等名胜古迹。
如有疑问请继续追问,望采纳,谢谢,您的采纳就是我的力量!
鸟巢的占地面积约为20公顷,5个鸟巢的占地面积约为约为1平方千米.___(判断对错)
谁说不是1年前1
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解题思路:就是求5个20公顷是多少公顷,用乘法计算.

20×5=100公顷,
1平方千米=100公顷,
所以5个鸟巢的占地面积约为约为1平方千米;
故答案为:√.

点评:
本题考点: 整数的乘法及应用

考点点评: 解决此题关键是先求出5个鸟巢的占地面积是多少,再把公顷数换算成平方千米,进而判断.

(2013•中宁县模拟)2008年北京奥运会主场“鸟巢”的建筑面积是二十五万八千平方米,这个数写作______平方米,写
(2013•中宁县模拟)2008年北京奥运会主场“鸟巢”的建筑面积是二十五万八千平方米,这个数写作______平方米,写成用“万”作单位的近似数是______万平方米.
y2k10251年前1
sukip 共回答了18个问题 | 采纳率83.3%
解题思路:这是一个六位数,最高位十万位上是2,万位上是5,千位上是8,写这个数时,从高位到低位,一级一级地写,哪一个数位上一个单位也没有,就在那个数位上写0;写成用“万”作单位的近似数就是省略“万”后面的尾数求它的近似数,要把万位的下一位千位上的数进行四舍五入,再在数的后面带上“万”字.

二十五万八千写作:258000;
258000≈26万;
故答案为:258000,26.

点评:
本题考点: 整数的读法和写法;整数的改写和近似数.

考点点评: 本题主要考查整数的写法、改写和求近似数,注意改写和求近似数时要带计数单位.

给下面这段话中译英内容:因为我很想看看那气派无比的鸟巢和水立方,接着用一天的时间去参观恢弘的故宫,然后再去北京一些有名的
给下面这段话中译英
内容:因为我很想看看那气派无比的鸟巢和水立方,接着用一天的时间去参观恢弘的故宫,然后再去北京一些有名的地方游玩,最后在第三天下午回家.
我还准备在暑假里做一些公益事业,比如清扫一下小区路面等等,我会觉得非常开心.
我还有许多快乐计划,总之我有一个快乐的暑假
georgelin11年前3
ktlj32871 共回答了11个问题 | 采纳率100%
Because I want to look at the incomparable style of nest and water cube, and then one day to visit the impressive National Palace Museum, Beijing and then go play some well-known places, and finally back home in the afternoon of the third day.
I am also ready to do something in the summer in public welfare undertakings, such as some cell surface cleaning, etc., I will feel very happy.
I have many happy scheme, in short I have a happy summer vacation
北京奥运会体育场“鸟巢”,它的主义建筑长330米,宽220米,高69.2米,建筑面积25万平方米.若用1:5000的
北京奥运会体育场“鸟巢”,它的主义建筑长330米,宽220米,高69.2米,建筑面积25万平方米.若用1:5000的
北京奥运会体育场“鸟巢”,它的主建筑长330米,宽220米,高69.2米,建筑面积25万平方米.若用1:5000的比例尺画在纸上,长画多少厘米,宽画多少厘米?
太坏1年前1
anglepeople 共回答了18个问题 | 采纳率88.9%
用上述尺寸除5000啊
下面各句中没有语病的是A.《时代》周刊评选出2007年全世界100个最具影响力的设计项目,其中,北京奥运场馆“鸟巢”夺得
下面各句中没有语病的是
A.《时代》周刊评选出2007年全世界100个最具影响力的设计项目,其中,北京奥运场馆“鸟巢”夺得建筑类最具影响力设计项目的桂冠
B.鹰在天空飞翔着,唱出了短促而悠长的歌声,我凝望着鹰,想从它如同信号的歌声中听出珍贵的消息来
C.2008年特大的我国南方罕见的冰灾雪灾,让我们记住了唐山13位普通农民自费救灾的慷慨豪情,也让我们在这种可歌可泣的英雄义举中感受到了寒冬里特殊的温暖
sweetswe1年前3
历史中的蛀牙 共回答了17个问题 | 采纳率94.1%
A对
B短促而悠长 意思相反
C特大的我国南方罕见的 修饰语顺序不对

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