大学英语课堂ppt展示-是否可以穿越时空

This is still a mystery now,however,we can believe that the mystery will be entirely cleared in the future with the development of science and technology!
Today,Let us talk a popular topic about :
What is your view?
existent
Yes
No
This is a controversial topic!
unconvinced
Belive
Binglsee
Ask some questions!
What is dimension?
The grandmother paradox!
now
before
If you went back in time,you could have prevented your grandmother meeting your grandfather,so that your mother would not have been born,and so nor would you.
Of course,the finder may be the one of you!
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2021/3/10
12
Parallel universers
Theory of relativity
The blake Hole theory
Agreement! Existing! Yes!
The parallar universes!
future
The time machine
now
before
firist
But why the
wk.baidu.com
The black hole
And now you are!
Different vioces!
The grandmother paradox!
Time inconsistency
Invisibility
No!!!
Time inconsistency future
now
Oh,no
before
There was no time machine before,it means you could not go back “now”!
Is it possilbe travelling through time?
One dimension: A line!
Tow dimensions:A
plane!
Three
dimensions:Three dimensional！
What are possible expre ssion of four-dimensional?
universes ha
second
ve different
third speed?
The theory of black holes!
light time space
The relativity of the black hole is so powerful that everyting is sucked into it!