Sun Huifang What do you think is the most important in our lives? Why?Unit 7DoYouKnowAny Deadly Diseases ? Heart disease, Cancer, Stroke, Diabetes, Alzheimer’s disease, Asthma, SARS,AIDS (HIV) AIDS is thefourth leading cause of death worldwide and the No.1 cause of death due to infectious disease....

时间:2024-11-21 09:18栏目:中学教育