In recent years, the social development and changes in employment situation have put higher requirements on college students. Instead of confining themselves to the knowledge in books,more and more college students are stepping-out of the “Ivory Tower” and taking an active part in social practice in their spare time. Through social practice, college students can have a deeper understanding of society, increase their sense of social responsibility, and improve their analytical and problem-solving abilities. Meanwhile, taking part in social practice can also help students recognize their own shortcomings and have a clear idea about where they are to go in the future. All these benefits will help them build up social and work experience, which will lay a solid foundation for them in finding jobs or starting their own businesses in the future.
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It is a tradition for Chinese people, when dinning, to sit around the table and share the same dishes. Different from that the westerners place flowers at the center of the dining table, the Chinese place dishes in the middle so that people could share them together. This custom reflects the importance of food in Chinese civilization. What is more important, this way of dinning facilitates(促进) the communication among diners. Usually, after a dinner, the relationships between friends get closer and the business partners deepen their mutual understanding. People would sometimes put the food into the bowls of the guests or the elders to show respect for them.
People who live in different areas of China have different kinds of food. Those in the north mainly prefer food made of flour while those in the south mostly eat rice. Along the coastal areas, sea food and freshwater products make up a considerable proportion of people’s diet whereas in other places, meat and dairy products are more common. The residents in Sichuan, Hunan and other provinces favor spicy food, but the citizens in Jiangsu and Zhejiang are fond of sweet food. However, owing to various cooking methods, the same food might taste different.
电压源与电流源的等效变化是针对( )。
A. 电源的内部
B. 电源的外部
C. 两者都不是
电压源与电流源之间的等效变换,不论对内电路还是对外电路都是等效的。____二、选择题
A. 对
B. 错