应急程序中,()是应急指挥、协调和与外界联系的重要保障。
A.指挥与控制
B.警报和紧急公告
C.通信
D.事态监测与评估
参考答案:C
--- I once got lost during my first visit to Beijing.
-- Oh, did you? You _______ me as your guide.
A.might have asked
B.could ask
C.would have asked
D.would ask
动脉血压脉压大小主要反映
A.每搏输出量的多少B.外周阻力的大小C.大动脉弹性的好坏D.心脏泵血功能的好坏E.血管充盈的程度