People and animals live in the same world. We should keep the balance（平衡）b____ people and animals. If the balance is destroyed，there will be bad result to both people and animals. Wild animals are friends of people. We have to p____ them， or there will be no wild animals in the future. Now we know that there are  n____ 2，000 nature reserves(自然保护区) in China

    There is a black and white animal l____ in China. It is always known as the national treasure(国宝) of China. Everyone knows it is c____ Giant panda. Now there are f____ pandas than before. Most of them live in Sichuan and Gansu Provinces. There are also some other rare animals in China. H____， the n____ is becoming smaller and smaller than before. So people should try t____ best to help these animals. They are in d____ of disappearing from the world.

用如图所示装置来研究豌豆种子萌发过程的温度变化．在A～D四幅坐标图中，能表达实验结果的是（　　）