题目

若物体做1 200 J的功，可使物体温度升高3 ℃，改用热传递的方式，使物体温度同样升高3 ℃，那么物体应吸收______________J的热量，如果对该物体做3 000 J的功，物体的温度升高5 ℃，表明该过程中，物体还____________（填“吸收”或“放出”）热量__________J. 答案：解析：做功和热传递在改变物体内能上是等效的，因此物体用做功方式温度升高3 ℃，如用吸热方式，也使温度升高3 ℃应吸收1 200 J热量. 如对物体做功3 000 J，温度升高5 ℃，而物体温度升高5 ℃，需要的功或热量应为ΔE1 200 J=cm×3，ΔE=cm×5，ΔE=2 000 J.因此物体应放出1 000 J的热量.答案：1 200       放出 缺词填空(5分) L___1___ many other parents, I worry that my children watch too much TV. Why? First, there are m___2____ bad TV programmes (节目) on TV. Children can c___3____ what they see on it. Second, s____4___ in front of the TV set all day is bad for their eyes. Many students wear g__5_____ because they watch TV for long hours .Also, watching too much TV m___6____ children think little. I think it is very i___7____ for children to read some books. Books will make children think m__8______. When I say something to my children , they just do not answer. They are b____9__ watching TV and have no time to answer me. So I h__10____ to sell(卖) the TV set. Don’t you it is a good idea? 1 L_______   2  m__________ 3 c_________ 4 s_________ 5 g_________ 6 m_______   7  i___________ 8 m________ 9 b_________ 10 h________