四技二專、二技統測◆英文題庫下載題庫

A greenhouse is a ____46_____ made of glass that allows sunlight to enter hut ______47______ heat inside, so the building stays warm even when it's cold outside. _______48________ gases in the Earth's atmosphere also let in light but trap heat, many people call this phenomenon the “greenhouse effect/' If it were not for greenhouse gases trapping heat in the atmosphere， the Earth would be a very cold place. The Earth gets energy from the sun in the form of sunlight. The Earth's surface ________49________ some of this energy and heats up. That’s why the surface of a road can feel hot even after the sun has gone down. The Earth cools down by giving off a different form of energy, ________50_______ infrared radiation. Before all this radiation can cscape to outer space，greenhouse gases in the atmosphere absorb some of it, which makes thie atompsphere warmer,As the atmosphere gets warmer, it makes the Earth's surface warrheh ,too.