若△ABC三边长a，b，c满足|a+b-7|+|a-b-1|+（c-5）²=0，则△ABC是（　　）

A．等腰三角形

B．等边三角形

C．直角三角形

D．等腰直角三角形

There are times when people are so tired that they fall asleep almost anywhere. We can see a lot of people sleeping on the bus or train on their way home __小题1:__ work in the evening. A man will be reading the newspaper, and seconds later it appears as if he is trying to eat it. Or he will fall asleep on the shoulder of the stranger sitting next to him. Another place where __小题2:__ (plan) short sleep goes on is in the lecture hall __小题3:__ a student will start snoring so loudly that the professor has to ask __小题4:__ student to shake the sleeper awake. A more _小题5:__ (embarrass) situation occurs when a student starts falling into sleep and __小题6:__ weight of the head pushes the arm off the desk, and the movement carries the rest of the body along. The student wakes up on the floor with no memory of getting there. The __小题7:_ (bad) time to fall asleep is when driving. Police reports are full of accidents that occur when people fall into sleep and go off the road. __小题8:__ the drivers are lucky, they are not seriously hurt. One woman’s car, for example, went into the river. She woke up in four feet of water and thought that it __小题9:__ (rain). When people are really tired, __小题10:__ will stop them from falling asleep — no matter where they are.