Thank you. Who wants it? If the email can't be sent, QQ will add me. I'll give you the answer. Please specify why you added me!
Remember to help me adopt! Hetong, thank you. I still have students studying physics in the whole school! Want it? Hehehe!
Note: I'm just going to help others! Guess what? One month before the final exam, I didn't give an answer, but I kept studying.
This answer will end on June 0, 20 13 and start on September 20 14. If you need the answer to the whole-effect study in Grade 8 next semester, I will send it around February. Of course, you should praise me and add me QQ.
(As soon as I finished, I accidentally deleted the answer.)