下列有关实验装置的说法中正确的是（   ）

如图为某生态农业中部分生物的关系图，图中箭头表示能量在生物问的传递方向，请运用所学知识分析回答问题：

根据短文内容，选择正确答案。
D
    The students are having their chemistry (化学) class. Miss Liu is telling the children what water is like. After that, she asks her students, “What's water?”No one speaks for a few minutes. Miss Liu asks again, “Why don't you answer my question? Don't I tell you what water is like?”
    Then a boy puts up his hand and says, “Miss Liu, you tell us that water has no color and no smell. But where can we find such kind of water? The water in the river behind my house is always black and it has bad smell. "Most of the children agree with (同意) him.
    “I'm sorry, children.” says Miss Liu. “Our water is getting dirtier and dirtier. That's a problem.

—You should take more exercise.

—______. It's good for my health.

如图，T₁、T₂是监测交流高压输电参数的互感器，其中a、b是交流电压表或交流电流表．若高压输电线间的电压为220kV，T₁的原、线圈匝数比为1：100，交流电压表的示数为100V，交流电流表的示数为1A，则（   ）