Thedisplayofamobilephoneshowedanalert（警報）duringatestinadowntownhotelinAmsterdam,theNetherlandsonTuesday.Dutchauthoritiesweretestinganemergency"cellbroadcasting"systemthatsendsatextmessagesimultaneously（同時）toeverymobilephoneinadefinedarea.Abouthalfthepeopleinthebuildingfollowedinstructionsandevacuated（疏散）. AP