原题
Plants have tiny holes called stomata on their leaves and stems that allow them to take in carbon dioxide from the air and release oxygen into the air. How, stomata c also l water vapor esc, which cau problems i dry enviro. To man this, dur hot per when water loss is especially severe, some plants close their stomata temporarily. Another special adaptation is thick, waxy coatings on plant leaves that help conserve water.
参考答案：ever an et ape ses n nments age ing iods
解题思路
老师暂未填写解题思路。