A．fter a fire has been extinguished in a closed space, personnel may safely enter the space when

A．smoke density has been decreased sufficiently to see the bulkhead opposite the compartment's entrance

B．a lifeline and explosion proof flash light are used

C．all smoke and toxic fumes are removed and an adequate oxygen supply is present

D．overhaul has been completed to remove any possible source of re-ignition

[单选题]He has been ______ for nearly three weeks after the death of his dear pet.A

[单选题]After knowing his partner has been under arrest，he( )his crime.A.concededB.

[单选题]After knowing his partner has been under arrest，he( )his crime.A.concededB.

[单选题]The project budget has been finalized.Additional work has been discovered t

[单选题]The patient has been ________ of the safety of the operation.[A] assured[B] guaranteed[C] entrusted[D] confirmed

[单选题]There has been significant divergence in practice over recognition of revenue mainly because International Financial Reporting Standards (IFRS) have contained limited guidance in certain areas. The International Accounting Standards Board (IASB) as a

[单选题]where has Barbara been?A．MilanB．Florence.C．rome

[单选题]Therehasbeenacollision___anumberofcarsonthemainroadtotown.A)composingB)consistingC)involvingD)engaging

[试题]Therehasbeenacollision___anumberofcarsonthemainroadtotown.A)composingB)consistingC)involvingD)engaging

[主观题]Therehasbeenacollisionanumberofcarsonthemainroadtotown.A)engagingB)composingC)involvingD)consisting