`->Chọn A`
`{A1}/{A2}=3/{1,5}=2`
`=>Chọn A`
`Ta` `có:`
`A1``/``A2` `=` `3/(1,5)` `=` `2`
`=>` `Vậy` `chọn` `A`
What does the doctor recommend to eat?
Your browser does not support the audio element.
What do happy people do?
What kind of food will help people to keep fit and stay healthy?
