处理框(执行框)
—When did you get to know the foreigner?
—_______ October 1st, 2009.[ ]
A. At
B. In
C. On
D. For
干燥灭菌后的胶塞应在()内使用,若超时限应重洗。
A.12h
B.24h
C.32h
D.36h