All apparatus ______ （test)before the experiment began.

医疗器械(medical apparatus and instrument)

A.organization

B.work hard

C.lazy

医疗器械监督监督管理(medical apparatus and instrument administration)

The portable radio apparatus means ______．

A.the radio apparatus fitted on the portside．

B.the radio with a portable equipment．

C.the radio equipment which is easily movable．

D.the portable radio with some apparatus

A. sport apparatus

B. physical education

C. physical power

D. physical strength

A.be located in close proximity to the main control station

B.be equipped with battery powered emergency lighting

C.be marked SELF-CONTAINED BREATHING APPARATUS

D.All of the above

A．inflatable buoyant apparatus type

B．buoyant apparatus type

C．life float type

D．Any of the above types are acceptable

The function of the bypass valve on the self-contained breathing apparatus is to ______．

A.control the pressure of the oxygen as it enters the body

B.allow the wearer to manually give himself oxygen

C.release excess heat which would otherwise cause the bottle to explode

D.allow exhaled gases to pass outside the bottle