Question

寒假作业里有几道题不会，大家帮帮忙！谢谢啦！！

英语：
补全对话：
A:____________________________?
B:Of course,I would love to._______________________?
A:About the new Steven Spielberg film.I gear it's exciting!
B:_____________________________?
A:You know he directed Jurassic Park.
B:Oh,It's boring.The book by Michael Crichton was fascinaing,but the movie was terrible!
A:__________________________?
B:My favourite film is "The Lion King".________________?
A:I like the film about fighting."Star Wars" is the best film I have seen.
B:Oh,the bell is ringing.Let's go into the class first!

物理：
1、目前，地球大气层外的臭氧层出现的“空洞”是怎样形成的？有何危害？有关国际组织正在采取何种措施解决这一问题？
2、人们在使用望远镜时，总是要对着被观察的远处景物调试一下。试问“调试”的是什么？并说明调试后看清远处景物的道理。
3、高为h的人在路灯下，朝向路灯的方向沿水平地面以速度v匀速走去，路灯距地面高为H，试求人影顶端在地面上移动的速度，并由计算结果说明人影顶端的移动是否是匀速的，其移动速度较人走得速度大还是小。

化学：
1、往盛有石灰石的试管里地价稀盐酸，会有什么现象？得出什么结论，或有什么文字表达式？
2、甘油的化学名称为丙三醇，他的化学式是C3H8O3。甘油的水溶液有宝石润肤作用，将甘油和水爱质量比为4：1比例配制的甘油溶液护肤效果最好。
问：护肤效果最好的之中甘油中，氧元素的质量分数是多少？（要求写出计算过程）

回答的好有追加分的哦！！

Answer 1

补全对话：
A:__Would you like to go to the cinema with me____?
B:Of course,I would love to.___Which film do you want to see__?
A:About the new Steven Spielberg film.I gear it's exciting!
B:__Why do you like Steven Spielberg ___?
A:You know he directed Jurassic Park.
B:Oh,It's boring.The book by Michael Crichton was fascinaing,but the movie was terrible!
A:_So,what's you favourite file ______?
B:My favourite film is "The Lion King".__What about you______?
A:I like the film about fighting."Star Wars" is the best film I have seen.
B:Oh,the bell is ringing.Let's go into the class first!

化学：石灰石溶解 化学方程式：CaCO3+2HCl=CaCl2+CO2(上箭头)+H2O

如果只是问甘油中O元素的质量分数＝16*3/(12*3+8+16*3)=52.174%

Answer 2

补全对话：
A:__Would you like to go to the cinema with me____?
B:Of course,I would love to.___Which film do you want to see__?
A:About the new Steven Spielberg film.I gear it's exciting!
B:__Why do you like Steven Spielberg ___?
A:You know he directed Jurassic Park.
B:Oh,It's boring.The book by Michael Crichton was fascinaing,but the movie was terrible!
A:_So,what's you favourite file ______?
B:My favourite film is "The Lion King".__What about you______?
A:I like the film about fighting."Star Wars" is the best film I have seen.
B:Oh,the bell is ringing.Let's go into the class first!

化学：石灰石溶解 化学方程式：CaCO3+2HCl=CaCl2+CO2+H2O