内科疾病急性期病情观察的重点是（）
A.体温、脉搏、呼吸、血压
B.疾病症状、体征
C.精神状态
D.进食、睡眠状况
E.排泄状况
参考答案：A
简述水体自净过程的基本特征。
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
