阅读课文，回答问题。

雪地里的小画家

下雪啦，下雪啦！

雪地里来了一群小画家。

小鸡画竹叶，小狗画梅花，

小鸭画枫叶，小马画月牙。

不用颜料不用笔，

几步就成一幅画。

青蛙为什么没参加？

他在洞里睡着啦。

在某次救援训练中，直升机沿着水平方向匀速飞行，救援队员沿着竖直绳索向上攀升．若飞机水平飞行速度为4 m/s，救援队员沿绳索攀升速度为2m/s，则救援队员相对地面的速度大小为____m/s，方向与竖直方向成θ角，tanθ=____．

照样子把句子写具体。

例：红军把院子打扫得（干干净净）、土地整治得（平平展展）的。

①早上，妈妈打扮得____地出了门。

②周末了，我多想____地玩呀！

③我每天都把床铺收拾得____。

阅读短文，根据首字母提示填写单词。

      There is nothing more i____ to life than the sun. W____ the sun, all living things on the earth would die. The sun is a star. In the sky there are t____ of stars like the sun. They are as large as the sun and as hot as the sun. At night you can see many stars, but in the day you can o____ see one star-- the sun.

      The sun is much n____ to us than any other star. That is w____ it looks the biggest and brightest of all the stars. The distance (距离) of the sun from the earth is as m____ as 150,000,000 kilometers. Most stars are thousands of light-years a____from the earth.

      Do you know what a light-year is? N____ in the world travels faster than light. It travels 300,000 kilometers per second. And one light-year is the distance that light can travel in one y____.

用所学知识完成下面各题：