Are you____ ____the Chinese test?
(____)A. Orange, orange. Sit down.
(____)B. Black, black. Stand up.
(____)C. White, white. Touch the ground.
(____)D. Brown, brown. Turn around.
(____)E. Red, red. Carry your bag.
根据下列句子及所给的首字母,写出各单词的正确、完全形式(每空限填一词)。
如图所示实验或事例,属于内能转化为机械能的是( )