It is Saturday afternoon. Liu Tao and his friend David are taking a walk in the park. There are many public signs in it. They mean different things. Liu Tao knows a lot of things about them. Suddenly, they see a short man walking on the grass. Liu Tao points to the sign on the grass and says to him, "Sir, look at the sign! You can't walk on the grass. "The man smiles and says, "You are right, young man. But I'm the park keeper. I'm looking after the grass. "

含羞草受到碰撞时，展开的叶片会合拢，与含羞草相同的生理现象的是（  ）

先说图意，再列式计算。

说出下列句子的修辞手法

他张开大口，对着大山大吼了声，大山抖了三抖。