A. 对 B. 错
A. known quantity B. a ruler C. a scale D. a unit
A. length B. voltage C. art D. brightness
A. describing things B. making things C. quality control D. all of the options(全部选项均正确)
A. something extremely large B. science of measurement C. a unit of length D. none of the options(无正确选项)
A. design B. manufacturing C. inspection D. all of the above(全部选项均正确)
A. m B. s C. kW D. kg