阅读理解

    Mr. Smith made many tests with different animals. They found that the monkey was the cleverest of all the animals. One day Mr. Smith put a monkey in a room. He also put some small boxes in it. In one of the boxes there was some food. “How long will it take the monkey to find the food?” Mr. Smith said to himself. “Let me wait and see.” He left the room and waited outside. Three minutes later, he put his eye to the keyhole (猫眼). What did he see? He saw the eye of the monkey. The monkey was on the other side of the door and looked at Mr. Smith through the keyhole.

在细胞中与呼吸作用有关，为细胞的生命活动提供能量的结构是（　　）

关于标有“6V 3W”字样的小灯泡（忽略温度对灯丝电阻的影响），下列说法正确的是（   ）