Read and circle. 选出合适的单词。

1. Where does a panda         (live/lives)?

2. I have fur, four legs and a tail. I can say woof. I am a        (dog/duck).

3. The farmer         (have/has)a camel.

4. Cows eat         (grass/grasses) .

5. There are some apples  _      (on/in)an apple tree.

相邻等高线之间的水平距离称为等高线平距，用h表示。( )