—What can you see in the picture?

—I can see a farm. And there ______ a lot of animals on it.[ ]

A. is

B. are

C. be

D. am

下列关于能量转化、转移现象的说法中，错误的是:

A．电池充电，电能转化为化学能

B．电动机工作，电能转化为机械能

C．暖瓶塞被热气弹开，机械能转化为内能

D．用热水袋取暖，内能发生了转移