促销的实质是( )。
A.推出产品广告
B.观察受众反应
C.沟通和传递信息
D.协调公共关系
参考答案:C
解析: 促销的实质是营销管理者与目标市场之间的信息沟通和传递。
窦房结内游走心律的心电图诊断包括()
A.P波形态改变,在同导联的P波形状稍有不同
B.P—R间期<0.11s
C.P—R间期不恒定,P—P间期诞长,在同导联P波形状变小、低平,但不倒置
D.P—R间期>0.12S
E.P波在Ⅱ、Ⅲ、aVF倒置,aVR可倒置、可直立
If a DSC distress relay is transmitted from coast station , it will().
A.indicate the ship in distress that the alert has been received
B.alert ships in the area of a distress incident that a distress has occurred
C.inform other coast station of distress incident
D.repeat the distress alert in 5 minutes