英语口语129644

1、手机起源与发展,The phone was first invented by Motorola Inc. of the United States. Mobile phones, Japan and Hong Kong and Taiwan is often referred to as mobile phones, flashlights, cellular phones, commonly known as early and Mobile can be used in a wider range of portable telephone terminal. Which has bee

2、n developed to 4G era,From the phone registered patents in 1973, until 1985, before the birth of the first in the modern sense, the real mobile phone. It was very heavy and was called the shoulder phone,Since then, the development of mobile phones was more and more rapidly. In 1991, the phone weighs

3、 250 grams; the fall of 1996, a volume of 100 cubic cm, weight 100 grams mobile phone. After further, smaller, lighter, in 1999, it lights to less than 60 grams,手机对生活的影响,With the development of science and technology, mobile phone penetration rate is already high, of course, the increasingly high de

4、pendence of people on the phone. Now high school students and even primary school students with mobile phones. In fact, the presence or absence of mobile phones in some cases there is no difference,Such as primary and secondary school students, the main thing is to learn, most of the time in school and at home, so the phone is almost not have any effect, the students something to tell the class teacher. With the phone is just a