题目

关于噪声，下列说法正确的是（ ） A . 物体振动发出的声音一定是噪声 B . 乐音一定不是噪声 C . 乐音也可能成为噪声 D . 所有噪声响度一定很大 答案：CDaming爱照相，请你帮他圈出恰当的图片说明。（每小题1分，共5分）【1】（ ）A. It’s my toy car.B. It’s my toy ship.【2】（ ）A. I have breakfast at half past seven. B. I go to school at half past seven. 【3】（ ）A. My mother goes to work by bike. B. My mother goes to work by car.【4】（ ）A. I play football at the weekend. B. I watch TV at the weekend. 【5】（ ）A. My father is reading a book. B. My father is riding a bike.