However,if we have s_____ knowledge about these signs,there will be fewer casualties and losses .In areas where earthque

However,if we have s_____ knowledge about these signs,there will be fewer casualties and losses .In areas where earthquekes often happen,scientists record mountain t_____ to see how hot and cold they are and take photos from the air.If there are any signs of a p____ disaster ,they will warn the government to be p_____for it .