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中国的武装斗争实质上是工人阶级领导的农民战争。
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在关系数据库中，能够唯一标识一个记录的属性或属性的组合，称为（）。
假设一个书店用（书号，书名，作者，出版社，出版日期，库存数量……）这一组属性来描述图书，可以作为“关键字”的是（）。
ClozeComplete the following passage with the words in the Word Bank. 请直接填写答案编码如：AResearchers from CNRS and the Spanish foundation Fatronik have designed a manipulator-type robot that is twice as fast as all existing robots. To 1)_____this feat, which has not gone unnoticed by industry, they have worked on 2)_____both the shape of the robot and its control system. The robot, baptized Adept Quattro from the name of its manufacturer and because of its four arms, has just been 3)_____on the market. Several hundred orders have already been placed, among others, by the food 4)_____, health and beauty industries.The LIRMM (Montpellier Laboratory of Computer Science, Robotics, and Microelectronics,CNRS/Université Montpellier 2) has worked for many years on the creation of 5)_____in the field of parallel robots. These manipulator robots 6)_____several “arms” or 7)_____chains linking their base to their mobile parts. They are employed in various industries to handle small objects on production lines. Over the last six years, the LIRMM has teamed up with the Fundación Fatronik, an applied research center in the Spanish Basque Country, to design and control 8)_____robots. The researchers have come up with a solution that is both 9)_____and compatible with the 10)_____of industry. Innovative by the general shape of the robot: it has four robotic arms with different ergonomics to those of a conventional single robotic arm and more similar to a human arm.
已知被测介质的体积流量为60m3/h（立方米/h）,介质密度为3kg/m3,则流体的质量流量为kg/h。
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