| 1. | With the raise of living standard , social development and scientific technology progresses , various kinds of electrical household appliances , official automatic equipments and mobile communication units enter into offices and family house , increasing the working efficiency
摘要随着人民生活水平的提高以及社会的发展和科技进步，各类家用电器、办公自动化设备、移动通讯设备等迅速进入办公室、家庭，提高了人们的工作效率，丰富了人们的精神和物质生活。 |
