介绍家乡石家庄的英语作文

Shijiazhuang is the capital and largest city of North China's Hebei Province. Administratively a prefecture-level city, it is about 280 kilometres (170 mi) south of Beijing. Shijiazhuang Prefecture contains the Shijiazhuang metropolitan area, the Jingxing Mining District, five county-level cities, and twelve counties, and has a total population of 9.6 million, with 2.6 million in the metro area in 2008. Shijiazhuang is a newly industrialised city. It experienced dramatic growth after the founding of the People's Republic of China in 1949. The population of the metropolitan area has more than quadrupled in only 30 years[1] It is a central hub of transportation routes. The city is home to large garrison of military troops in case of need to protect Beijing[1] It has a number of PLA colleges and universities. Electronics engineering, also referred to as electronic engineering, is an engineering discipline where non-linear and active electrical components such as electron tubes, and semiconductor devices, especially transistors, diodes and integrated circuits, are utilized to design electronic circuits, devices and systems, typically also including passive electrical components and based on printed circuit boards. The term denotes a broad engineering field that covers important subfields such as analog electronics, digital electronics, consumer electronics, embedded systems and power electronics. Electronics engineering deals with implementation of applications, principles and algorithms developed within many related fields, for example solidstate physics, radio engineering, telecommunications, control systems, signal processing, systems engineering, computer engineering, instrumentation engineering, electric power control, robotics, and many others
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