1．When they’re under attack by insects or disease. 根据第一段Even plant can run a fever, especially when they’re under attack by insects or disease.可判断作答。
2．We can use infrared scanning to locate the problem area. / By using infrared scanning to locate the problem area. / By adopting the infrared scanning technology. 根据第一段A decade ago, adopting the infrared(红外线)scanning technology developed for military purposes and other satellites, physicist Stephen Paley came up with a quick way to take the temperature of crops to determine which ones are under stress.可判断作答。
