A shipmate suffers a heart attack and stops breathing. You must（）.

A.administer oxygen

B.immediately check his pulse and start CPR

C.make the victim comfortable in a bunk

D.immediately give a stimulant，by force if necesssary

当应答机1和ADIRS2故障时，应答机2（）提供高度报告，此时若要使应答机2正常工作需（）？

A、能；AIRDATASWICHING选择CAPT位

B、不能；AIRDATASWICHING选择CAPT位

C、能；AIRDATASWICHING选择F/O位

D、不能；AIRDATASWICHING选择F/O位