餐饮企业对用过的餐具进行消毒,这种对餐具的消毒属于
A.终末消毒
B.疫源地消毒
C.随时消毒
D.预防性消毒
E.化学消毒
参考答案:D
My father told me that light __________ much faster than sound. [ ]
A. is traveling
B. will travel
C. traveled
D. travels
下列溶剂极性最大的是()
A.EtOAc
B.Et2O
C.EtOH
D.n-BuOH
E.CHCl3