2020版高考化学大一轮复习第6章化学反应与能量转化1第1节化学反应的热效应课件鲁科版

1、第6章化学反应与能量转化第1节化学反应的热效应第6章化学反应与能量转化测定反应前后溶液的温度使反应充分、体系温度均匀保温反应容器聚集状态单位团Tiffany，a 16yearold girl，was very shy.Last September，her best frien “I was really sad the moment I heard the bad news and I didnt know what to do，” Tiffany recalled.“I shut myself in my room for a whole week.It was then that my a

2、unt took me to a sports club one Saturday and I saw so many young people playing different kinds of sports there.I signed up for a beginners course in volleyball and since then I have been playing this sport.Now I practice twice a week there.It is wonderful playing sports in this club and I have mad

3、e lots of friends as well. 2 ”The most basic aim of playing sports is that you can improve your health even if you are not very good at sports.Besides，you can get to know a circle of people at your age while playing sports. 3 Since she joined the sports club，s I got used to the life here. And now I

4、know lots of (5)_ here. For example, when I meet my friend on the street, I usually (6)_ him like this, “Hey, where are you going?” In our country if someone asks this, people may get (7)_ but in this country people wont. Of course, there are some other interesting things here. Ill tell you about th

5、em next time.he has opened up herself and now she has become very active and enjoys meeting and talking with others.1Its polite for girls to kiss each other on the side of the face.s also become more confident.团圆圆一家在台湾可受欢迎了。每天，小朋友们排着长队，等着跟它们合影留念。从“排着长队”体现出每天喜欢它们的人不计其数，特别受选D.A.根据同类项合并法则,与不是同类项,不能合并,故本选项错误;B.根据算术平方根的定义,=3,故本选项错误;C.根据同底数幂的乘法aa2=a3,故本选项错误;D.根据积的乘方,(2a3)2=4a6,故本选项正确.欢迎。从“合影留念”体现出大家都想和