Is Nam and Ba students

->Are Nam and Ba students

Who they are?They are engineer

->Who are they?They are engineer

Where Ha's house?

->Where is Ha's house?

Điền dấu <. >, =?

5,7+ 8,8......14,5

He said he shouldn't have done like that if he had been me and he asked if it wasn't very dangerous.

Last year,when my birthday party,my parent bought me a phone.It so wonderful because I alway wants to have a phone to call somebody I like and I need to play the game and do many thing and now it is come true.My phone has a white colour,have a big phone screen and have a camera so I can watch a film I like and learn the homework too.My phone can take a photo,listen to music,watch the film,play the game...I very like my phone, I alway take it with me when I go.I ussally call my parent to they know what I'm doing now,where I'm in now and can I do something like stay in my friend,come and play something far in my house...Although now all my friend has a new phone, It look very beautiful and better than my phone and now my phone look not new like first time I see it,I very like it and respect it.I will be buy a new phone when this phone can't use anymore.Now my test come here is over.thanks for listen to me

Dùng một dây đồng đường kính 0,8mm có một lớp sơn cách điện mỏng, quấn quanh một hình trụ có đường kính 2cm, chiều dài 40cm để làm một ống dây, các vòng dây quấn sát nhau. Muốn từ trường có cảm ứng từ bên trong ống dây bằng l , 76.10 − 8 Ω m  thì phải đặt vào ống dây một hiệu điện thế là bao nhiêu. Biết điện trở suất của đồng bằng  l , 76.10 − 8 Ω m