世界上面积最大的岛屿是（   ）

若复数$z=\frac{a+3i}{1+2i}\left(a\in R\right)$实部与虚部相等，则a的值等于（  ）

在历史长河中，一些重大史实历经时间考验得以延续。下列史实延续到清朝的是（    ）

阅读理解

    Do you want to be a newsreader or a presenter? By reading this you’ll know how to take the first step to be one! Making a radio programme is fun．

    The most important thing you need to do is to decide what kind of programme you are going to offer．Have you always wanted to be a DJ just to play music? If so，what kind of music? And will others want to listen to the music you want to play?

       Maybe it’s not music but information that you want to offer．You may want to do a talk show about a special subject．If so，great! Choosing something you’re interested in will make it a great experience for you．If you’re good at a subject，you’ll be known as a great presenter．

       Or，maybe you would like to make a programme like an interview with others．Programmes like this are easy to listen to and always interesting to make because you’ll never know what a guest is going to say and maybe your subject will change．

大写字母B由三笔写成。