题目

Their cheery song brightens many a winter's day. But robins are in danger of wearing themselves out by singing too much. Robins are singing all night一as well as during the day, British-based researchers say. David Dominoni, of Glasgow University, said that light from street lamps, takeaway signs and homes is affecting the birds' biological clocks, leading to them being wide awake when they should be asleep. Dr Dominoni, who is putting cameras inside nesting boxes to track sleeping patterns, said lack of sleep could put the birds’ health at risk. His study shows that when robins are expos以下关于蒸发的说法中正确的是A.液体在一定温度下才能蒸发B.蒸发是发生在液体表面和内部的汽化现象C.液体是否蒸发，与液体多少有关D.蒸发是一个吸热过程