用手指与拇指直立地拿著吸入器,将拇指放在底部, 及吸口的下方.Hold inhaler upright between fingers and thumb with your thumb on the base, below the mouthpiece.针对氧气吸入器检定过程中存在的主要问题,指出了计量器具检定的必要性、重要性.Points out the necessary and important meaning of the ...
福建的卡氏小鼠 ( 啮齿目: 鼠科 )A NOTE ON A SMALL FIELD RAT , MUS C . CAROLI BONHOTE IN FUJIAN ( MAMMALIA: MURIDAE )鼠科内最的就是家鼠.The best known mouse species is the common house mouse ( Mus musculus ).江苏泗洪下草湾中中新世脊椎动物群—— 4. 睡鼠科 ( 哺乳纲, 啮齿...