单项选择题
A rescuer can most easily determine whether or not an adult victim has a pulse by checking the pulse at the（）.
A.carotid artery in the neck B.femoral artery in the groin C.brachial artery in the arm D.radial artery in the wrist
单项选择题 A marker pole，with a horseshoe buoy and a sea anchor attached，should be used to（）.
单项选择题 （）the survivors known more of how to cope with cold water in the sinking of MV Titanic in 1912 countless lives（）.
