...a Functioned (-->Functioning) as a filter in the stratosphere, the ozone layer shields the Earth’s surface from much ultraviolet radiation . 這是一個...
1.(____)the ozone layer destroyed, the sun's ultraviolet would reach the earth. (1)Had (2...正解: (2)Were 假設語氣與現在事實相反句型. 還原句是: If the ozone layer were destroyed, the sun's ultraviolet would reach the earth. 2...
The ozone layer can absorb most of the ultra-violet radiation from the sun so that it can protect all the living things on Earth from being harmed by the dangerous rays.