BEIJING, Sept. 29 -- A 2,000-km quantum communication line opened on Friday between Beijing and Shanghai.
The line is the world's first trunk line of secure quantum telecommunications. The Jing-Hu (Beijing-Shanghai) Trunk Line connects Beijing, Jinan, Hefei, and Shanghai.
The line is connected with the world's first quantum satellite, which was launched by China in August last year, through a station in Beijing. The satellite is nicknamed "Micius," after a fifth century B.C. Chinese philosopher and scientist who has been credited as the first one in human history conducting optical experiments.
Bai Chunli, president of the Chinese Academy of Sciences (CAS), talked with staff in Hefei, Jinan, Shanghai and Xinjiang Uygur Autonomous Region, through the line. He also had a video call with Austrian quantum physicist Anton Zeilinger, through the satellite.
Quantum communications have ultra-high security. It is impossible to wiretap, intercept or crack the information transmitted through them.
一般过去时和过去进行时的用法比较
2010年中考英语语法难点汇总
have gone to和have been to的区别和用法
中考英语复习掌握三大题型
2010年中考英语动词时态复习考点7
2010年中考英语动词时态复习考点4
2010年中考英语动词时态复习考点3
一般过去时与过去完成时的用法比较
初中英语定语从句讲解和举例练习
09年北京市中考英语典型试题解析4
中考英语复习积累句型
中考英语常用口语词汇和短语(2)
中考英语情态动词的特殊用法
中考英语常用口语词汇和短语(3)
16种英语时态总结归纳
过去进行时用法五大注意事项
中考英语过去将来时时态用法讲解
中考英语语法:介词短语的句法功能
2010年中考英语含助动词句型精讲6
2010年中考英语含助动词句型精讲4
中考英语语法while的用法
2010年中考英语动词时态复习考点6
2010年中考英语含助动词句型精讲9
中考英语常用口语词汇和短语(1)
初中升高中英语学习衔接技巧
中考英语如何判断动词时态的技巧
2010年中考英语含助动词句型精讲3
2010年中考英语表语从句专项指导复习1
中考英语常见同义词
中考英语语法复习——部分倒装
不限 |
英语教案 |
英语课件 |
英语试题 |
不限 |
不限 |
上册 |
下册 |
不限 |