亚特兰大气候的特征以及形成的原因

解题思路：美国的城市众多，美国的华人分布较多的城市是旧金山、纽约、洛杉矶等，其中旧金山是美国华人最多的城市．

美国华人最多的城市是旧金山、纽约、洛杉矶等．
故选：C．

点评：
本题考点： 美国的人口、居民和主要城市．

考点点评： 本题考查美国华人最多的城市，属于基础题．

B

错的吧。人们一般都是在他们所生活的城市购买服装，亚特兰大的服装市场和洛杉矶的服装市场的地域不同，所以亚特兰大的服装市场区别于洛杉矶的服装市场。

物体在月球上受到地心引力的作用,它是地月之间的万有引力,正是由于它提供了向心力,月亮才能绕地球转动的 月亮上的引力是地球上引力的六分之一,所以它在月球上受到的重力为
G月＝1/6*G地＝1/6mg＝1/6*4.45*10^(-2)*10≈0.0742N
占旭刚要是在月球上能举起207.5千克*6=1245.6千克的最好成绩!

相当于时速36.5千米左右
100÷9.84=10.162601626 每秒跑的米数
60×60=3600秒 每小时3600秒
10.162601626×3600=36585.3658536米
36585.3658536米=36.5853658536千米
如有帮助 请采纳

（1）由C ₃ H ₈ （g）→CH ₄ （g）+HC≡CH（g）+H ₂ （g）△H ₁ =+156.6kJ•mol ^-1 ①，
CH ₃ CH=CH ₂ （g）→CH ₄ （g）+HC≡CH（g）△H ₂ =+32.4kJ•mol ^-1 ②，
则根据盖斯定律，反应C ₃ H ₈ （g）→CH ₃ CH=CH ₂ （g）+H ₂ （g）可由①-②得到，
所以△H=△H ₁ -△H ₂ =+156.6kJ•mol ^-1 -（+32.4kJ•mol ^-1 ）=+124.2kJ•mol ^-1 ，故答案为：+124.2；
（2）负极通入丙烷，碳元素的化合价升高，电池的正极通入O ₂ ，氧元素的化合价降低，即丙烷与氧气反应生成二氧化碳和水，
则电池的总反应为C ₃ H ₈ +5O ₂ ═3CO ₂ +4H ₂ O，原电池中阴离子向负极移动，即CO ₃ ^2- 移向电池的负极，
故答案为：C ₃ H ₈ +5O ₂ ═3CO ₂ +4H ₂ O；负；
（3）忽略水的电离及H ₂ CO ₃ 的第二级电离，pH=5.60，c（H ⁺ ）=10 ^-5.60 =2.5×10 ^-6 mol•L ^-1 ，
由H ₂ CO ₃ HCO ₃ ^- +H ⁺ ，
平衡时c（H ⁺ ）=c（HCO ₃ ^- ）=2.5×10 ^-6 mol•L ^-1 ，
c（H ₂ CO ₃ ）=（1.5×10 ^-5 -2.5×10 ^-6 ）mol•L ^-1 ，
则Ka=
c( H + )×c(HC O 3 - )
c( H 2 C O 3 ) =4.2×10 ^-7 mol•L ^-1 ，故答案为：4.2×10 ^-7 mol•L ^-1 ；
（4）NaHCO ₃ 溶液的pH大于8，则水解大于电离，水解生成H ₂ CO ₃ ，电离生成CO ₃ ^2- ，即HCO ₃ ^- CO ₃ ^2- +H ⁺ ，HCO ₃ ^- +H ₂ O H ₂ CO ₃ +OH ^- ，
所以c（H ₂ CO ₃ ）＞c（CO ₃ ^2- ），故答案为：＞；HCO ₃ ^- CO ₃ ^2- +H ⁺ ，HCO ₃ ^- +H ₂ O H ₂ CO ₃ +OH ^- ．

亚特兰大这些大城市聚集的区域是美国的西部工业区,被称为“阳光”地带.工业部门主要有航空、石油、电子等. 圣弗朗西斯科(城市)附近有四大电子工业基地之一的硅谷.

He was born on January 15,1929 in Atlanta,Georgia.

ACD.
B要考虑其转动的动作,不可以看成质点
ACD三个物体不要考虑其形状和大小.只要考虑其运动的轨迹的距离和运动的时间.可以看成质点

1.仔细品读最后一段,谈谈理解.
答：如果我们愿意与别人分享快乐,同时也让这份快乐滋润自己,那么我们心灵就永远不会荒芜.
2.孤独寂寞的贝尔太太想恢复昔日的美丽,她第三次让仆人换上一块牌子,上面写着：花园的美丽应与大家一起分享,希望大家到此游玩.

解题思路：（1）根据已知反应和目标反应，利用盖斯定律可知反应C₃H₈（g）→CH₃CH=CH₂（g）+H₂（g）由已知的反应相减得到，则△H=△H₁-△H₂；
（2）负极通入丙烷，碳元素的化合价升高，电池的正极通入O₂，氧元素的化合价降低，以此来书写电池总反应方程式，原电池中阴离子向负极移动；
（3）H₂CO₃HCO₃^-+H⁺的平衡常数Ka=

c(H+)×c(HCO3−)

c(H2CO3)

，利用忽略水的电离及H₂CO₃的第二级电离，由溶液的pH=5.60可知c（H⁺），然后代入计算；
（4）NaHCO₃溶液的pH大于8，则水解大于电离，水解生成H₂CO₃，电离生成CO₃^2-．

（1）由C₃H₈（g）→CH₄（g）+HC≡CH（g）+H₂（g）△H₁=+156.6kJ•mol^-1①，
CH₃CH=CH₂（g）→CH₄（g）+HC≡CH（g）△H₂=+32.4kJ•mol^-1 ②，
则根据盖斯定律，反应C₃H₈（g）→CH₃CH=CH₂（g）+H₂（g）可由①-②得到，
所以△H=△H₁-△H₂=+156.6kJ•mol^-1-（+32.4kJ•mol^-1）=+124.2kJ•mol^-1，故答案为：+124.2；
（2）负极通入丙烷，碳元素的化合价升高，电池的正极通入O₂，氧元素的化合价降低，即丙烷与氧气反应生成二氧化碳和水，
则电池的总反应为C₃H₈+5O₂═3CO₂+4H₂O，原电池中阴离子向负极移动，即CO₃^2-移向电池的负极，
故答案为：C₃H₈+5O₂═3CO₂+4H₂O；负；
（3）忽略水的电离及H₂CO₃的第二级电离，pH=5.60，c（H⁺）=10^-5.60=2.5×10^-6mol•L^-1，
由H₂CO₃HCO₃^-+H⁺，
平衡时c（H⁺）=c（HCO₃^-）=2.5×10^-6mol•L^-1，
c（H₂CO₃）=（1.5×10^-5-2.5×10^-6）mol•L^-1，
则Ka=
c(H+)×c(HCO3−)
c(H2CO3) =4.2×10^-7 mol•L^-1，故答案为：4.2×10^-7 mol•L^-1；
（4）NaHCO₃溶液的pH大于8，则水解大于电离，水解生成H₂CO₃，电离生成CO₃^2-，即HCO₃^-CO₃^2-+H⁺，HCO₃^-+H₂OH₂CO₃+OH^-，
所以c（H₂CO₃）＞c（CO₃^2-），故答案为：＞；HCO₃^-CO₃^2-+H⁺，HCO₃^-+H₂OH₂CO₃+OH^-．

点评：
本题考点： 用盖斯定律进行有关反应热的计算；电极反应和电池反应方程式；化学平衡的计算；离子浓度大小的比较．

考点点评： 本题考查了多个知识点，属于小综合习题，明确盖斯定律、原电池的工作原理、电离平衡常数的计算、溶液中利用电离与水解来比较离子的浓度即可解答，难度不大．

The Coca-Cola Company (Coca-Cola, The specific NYSE: KO) is a Company headquarters is located in The United States in Atlanta, Georgia multinational drinks manufacturers. Independent production of the products have coke, Sprite, fanta, marked, Glaceau vitaminwater, beauty of fruit series, QOO queer juice series, fly snow mineral water, pure water ice dew series series, the earth and heaven, and the valley of haze of tea series, etc. And nestle cooperative production of refreshing tea, a nestle canned nestle coffee etc.
Although many different about "Coca-Cola" the legend of the name, in fact, "Coca-Cola" English name is by pemberton was assistant accountant named Robinson and partner. He is a classical calligrapher, he thinks "two capital C word will look nice", so the Coca-Cola "with", "Coca" Coca leaves promotes practice is the spices, "Cola" is coke out of the fruit components. "Coca-Cola" trademark DuoNian to have been no change.
"Coca-Cola" the origin of the Chinese name
"Coca-Cola" this name, already "delicious" also "coke", not only keep English sound, still more interesting than English. The Chinese name is by scholars JiangYi translation to come out. "Coca-Cola" in "1920 s production but not in Shanghai has officially Chinese name. At first use" Ke Ke chew wax ", result because of improper literally in the Chinese market and failed to success. [1] so, when "Coca-Cola" dedicated to the overseas business "Coca-Cola" export company in Britain, was for translation. Was study in Britain, and the JiangYi with "Coca-Cola" four word beat the other competitors took 350 pounds. [1].
Advertising slogan
2000 heart jump in! We work hard to live out the brilliant!
2000 Koka-kola. Or
Tastes good act 2001
2003 in this burning passion
2010 and who you want to share the New Year the first a bottle of Coca-Cola
2011 positive and optimistic a better life
Coke history
Coca-Cola was a doctor of invention, also can saying is he manufactured the coke. Once, he gave a patient a doctor, opened a bottle of potions, let patients after coming home taking, results, when he ready to rest, suddenly night the man again come, and are glad to, will own the VAT handed to the doctor, filled with full requirements before a barrel, and a potion last time, just as the doctor muddleheaded ground did. The next day, he took a stronger player to come here, they pass their cups and bucket, rob to buy potions. The doctor was very strange, then ask why they every day to buy medicine, is it every family ill? People holding thumb praised the potion is very nice. Here The doctor confused: "no ill, why buy medicine every day? Is this the potions can cure, or delicious drink?" And so, he bold opened a "potions" factory, because this potion is very nice, people drink are extremely happy, he decided to call it "Coca-Cola", the unknown doctor, just because a bottle of potions, and then let his potions around the world. 1885, Georgia, USA "Dr. John Stith Pemberton. >. And invented the brunet syrup called pan burton French Wine coke (Pemberton 's Flench Wine Koka) in the same year the government issued a commissioner, so pan burton invention non-alcoholic Pemberton' s Flench Koka Wine. On May 8, 1886, pan burton doctor wanted to invent a drink, a kind of let many need compensatory nutrition people like to drink beverages. That day, he is prepared to stir the s Coca-Cola beverages, found it has a calming influence, refreshing, and ease headache, he will join the syrup and the liquid water, and then add ice, he tasted it, it's very delicious, but in the second cup, the assistant carelessly joined the carbonated water (soda water) (carbon dioxide + water) tastes better this time, partners (Flank M.L obinson) Robinson from two ingredients of syrup, stimulate the naming of inspiration, these two elements are Coca (Coca leaves and korah) (Kola) fruit, Robinson to neat and tidy, will the Kola change, and then in C K two words with a horizontal, and among Coca-Cola was born, and the first Coca-Cola sells for five cents.

解题思路：美国的城市众多，美国的华人分布较多的城市是旧金山、纽约、洛杉矶等，其中旧金山是美国华人最多的城市．

美国华人最多的城市是旧金山、纽约、洛杉矶等．
故选：C．

点评：
本题考点： 美国的人口、居民和主要城市．

考点点评： 本题考查美国华人最多的城市，属于基础题．