Here is a picture. It is a picture of my  1  This is my 2. My quilt is on it. Two baseballs are under it. They are white 3. Look at my desk. A4is on it. I like computer games. A 5is on it, too. It's 9:00. My 6is in my schoolbag and two7are in it. My books are8the floor. My keys are in the desk.9is my ID card? Do you10? Oh, it's in my English book. I like my room. It's nice.

关于我国领土四至点的叙述，正确的是（    ）

读一读，写一写，把你的发现告诉同学。

珊珊同学最近申请了一个电子信箱，其地址为FJSS@yahoo．Com．cn．对这个电子信箱，你得到什么信息？请你试着在某个网站申请一个免费电子信箱．

射击瞄准时应做到“三点一线”，是运用了光的____；游泳池注水后，看上去好像变浅了，是由于光的____形成的．