【判断题】Both ‘clear’ [l] and ‘dark’ [ɫ] are formed with the tip of the tongue touching the teeth ridge. The only difference is that in the articulation of the ‘clear’ [l], the back part of the tongue is raise...
【判断题】1MΩ=0.001GΩ=1000000Ω=1000kΩ
【单选题】某一公司面包检样用MPN法检测,BGLB复发酵后所得的阳性管数为0.01g(3管)、0.001g(1管)0.0001g(0管)。国标中当检验量为0.1g(3管)、0.01g(1管)、0.001g(0管)最终MPN值为43,根据国标,则这一面包样品的MPN值是()
【单选题】用托盘天平称量药品,它只能准确到: ( )。