How many year-round research stations are there in Antarctica?

How many year-round research stations are there in Antarctica? How many pens__your brother__every year How many months make a year? How many season are there in year? How many postcards___you___(send)every year? How many days does a year have? How many months in one year? 英语翻译How many days are there in a year How many days make a year all the year round 的 round 快 脑筋急转弯：How many men were born last year? How many season are there in a year哪错 HOW many months are there in a year?是什么意思? How many season are there in a year 改错 how many months are there in a year怎么回答 how many months are there in a year? How many terms does a school year have in Americe How many days are there in a year How many days are there in a leap year?回答