昆明一中2021届高三第二次月考数学答案及试题
Clean the air in your home.___40___The Department of Energy requires that ii can remove 99.97 percent of pollutants and particles in the air. Portable high-efficiency particulate air filters(过滤器)call clean a single room or the entire house.
A. Work near a window.
B. Study in the artificial light.
C. Studies have shown that color can influence your mood.
D. Maybe you have realized the importance of a healthy home.
E. Leave a pair of shoes you wear in the house by the front door.
F. A high-efficiency particulate air(HEPA)filter can cost much·
G. The gold standard is a high-efficiency particulate air(HEPA)filter.
郑重声明：本文版权归原作者所有，转载文章仅为传播更多信息之目的，如作者信息标记有误，请第一时间联系我们修改或删除，多谢。
