下列植物按低等到高等排列顺序是
①藻类   ②苔藓类    ③被子植物     ④裸子植物   ⑤蕨类植物

排列句子。

①吃在嘴里，又香又甜。

②它的形状是弯弯的，像个小月牙。

③剥开果皮，露出了白色的果肉。

④香蕉是我最喜爱吃的水果。

⑤果皮是淡果黄色的，还略带些小黑点。

欲建一座房子，使它的四周窗户都朝北，这座房子应建在（    ）

阅读理解

    Tom,Bill and Dave lost their backpacks．They are at the lost and found office．The backpacks are the same(相同的),but the things in them are different．Can you help them find the right(正确的)backpack?

    Tom：I have a  maths book and a pencil case in my backpack．There are three pencils,a pen and an eraser in the pencil case．

    Bill：I have a Chinese dictionary,a maths book and two notebooks in my backpack．

    Dave：There are two CDs,three picture books in my backpack．My English book is also in it．