高一英语作文：TVs and Radios

 　　TVs are more useful than radios. From TV you can see and hear what is happening in the world. However, radios are not disappearing. They are still with us. And the number of listeners is becoming larger. Do you know why?

　　One reason for this is the invention of the transistor¹. A transistor radio can be very small. It is very easy to be carried. Besides, radio broadcasts are better for blind people. Many old people don't have good eyesight. They can't watch TV, but can listen to music or news over the radio. What's more, a radio is cheaper than a TV set.

1 transistor   

n.晶体管，晶体管收音机

参考例句：

• This make of transistor radio is small and beautifully designed.这半导体收音机小巧玲珑。
• Every transistor has at least three electrodes.每个晶体管至少有三个电极。