【多选题】适合于用落球式黏度计测定黏度的流体包括( )
【简答题】句子排序。 ( ) Look at the blue T-shirt. ( ) Have you got a big one? ( ) I'II buy a T-shirt. ( ) Here it is. ( ) The blue one is small. ( ) That's nice. I'll take it.
【简答题】使用电子天平时如不慎按下了 键“CAL”,要及时用标准砝码重新校准后才能再次使用。
【单选题】I know the city well because I ______ there several times.