下列哪种液体是等张()
A.2:3:1液
B.4:3:2液
C.2:1液
D.1:2液
E.11.2%乳酸钠液
参考答案:C
Being able to speak another language fluently is a great________when you are looking for a job. [ ]
A. assistance
B. chance
C. advantage
D. importance
无菌药品生产对表面和操作人员的微生物监测,应当在()完成后进行。