某批次青霉素钠原料1mg相当于1670单位效价，生产规格为80万U/支的青霉素钠产品，每支所需的装量是()
E
暂无解析
肺炎鼻导管给氧的方法是（）
Mywalletisnowheretobefound.I_____itwhenIwasonthebus.
重写句子：Theteacherreturnedthehomework.Theteachernoticedtheerror.(complexsentence)
Copernicusmaintainedthattheearth_____roundthesun.
重写句子：Whenwearerelievedofworkingpressuresoftheoffice,wecanenjoyhappinessandrelaxationathome.(modifyingphrase)