What a big map _____ Australia!

下列少数民族与其民族节日对应正确的是

一个多边形的每个内角均为120°，则这个多边形是（　　）

阅读下面材料，在空白处填入适当的内容(1个单词或括号内的单词的正确形式)。
    Earthquakes are quite common. In fact, thousands of earthquakes happen each day. Most of them are ____ weak to feel, though. During a big earthquake, there is often a big noise first. Then the earth shakes ____(terrible) and many houses fall down.
     As one of the most deadly natural  ____（disaster) in the world, earthquakes often result in many people being injured or killed. In 2008, a severe earthquake hit China's Sichuan Province, which____(kill) more than 80,000 people there.  
    Besides, the great damage and deaths caused by the earthquake____(it), other accidents such as fires often follow.____ (much) buildings may be damaged and more deaths may be caused.
    For centuries, man have been making studies of earthquakes. About 2,000 years ago, for example, a Chinese scientist named Zhang Heng invented a machine, which could find out from which direction the earthquake waves came. With the rapid ____(develop) of modern science and technology, we now know a lot more about earthquakes. However, scientists still have
difficulty ____ (predict) exactly when and where ____earthquake will happen, and can't stop it ____happening.

读句子想象画面，再完成练习。

     在微风中，在阳光中，燕子斜着身子在天空中掠过，唧唧地叫着，有的由这边的稻田上，一转眼飞到了那边的柳树下边;有的横掠过水面，尾尖偶尔沾了一下水面，就看到波纹一圈一圈地荡漾开去。