1(15分)Why Does Rain Smell So Good?Do you love the smell of rain? If so, you’re not alone.___(actual), some scientists believe that people got their love for the smell of rain from___(ancestor), who relied on wet weather for their survival.But what makes rain smell so nice?
All of these chemicals combine to create the pleasant petrichor smell when rain hits(6) ground .Another smell associated with rain is ozone(臭氧).During a thunderstorm, lightning can split oxygen and another gas and(7)_(it) in turn can combine into a new substance. This substance reacts ...
Of course rain itself has no scent. But moments before a rain event, an "earthy" smell known as petrichor does permeate the air. People call it musky, fresh – generally pleasant. This smell actually comes from the moistening of the ground. Australian scientists first documented theprocess of...