装在中药仓库房门上,防止仓库内外空气对流
A.微波干燥养护法B.远红外加热干燥养护法C.蒸汽加热养护技术D.气体灭菌养护技术E.辐射灭菌养护技术
参考答案:E
— Why does she always ask you for help?
— There is no one else _______, is there? [ ]
A. who to turn
B. she can turn to
C. for whom to turn
D. for her to turn
分子式为C5H10O2的有机物为水果香味的液体,它与NaOH溶液共热后蒸馏,若得到的气体对H2的相对密度为23,则有机物的结构简式为( )
A.CH3COOCH2CH2CH3
B.CH3CH2COOCH2CH3
C.HCOOCH2CH(CH3)2
D.CH3COOCH(CH3)2