高压蒸汽灭菌时，当压力达 15 磅，温度 121℃时，维持时间
A、10分钟B
暂无解析
Theengineer______myfatherworksisabout50yearsold.
Thepolicemancameuptothelonelyhousewiththedoor_______,_______thereforawhileandthenenteredit.
Thereisalwaysareadymarket____SewingMachines,providedtheyare___goodqualityandcompetitiveinprice.
Wecannot_____presententertainanyfreshordersforYoungerBrandMen'sShirts.()
Don’ttrusteverything________youhavereadinthenewspapers.
