Unit 21 Human BiologyLesson 3 Epidemics ExplainedLook at the Key Words. Which of these diseases can be epidemic?AIDSCancerHeadacheFluHeart diseaseStomachacheTBEpidemics: Work in pairs. Do you think these statements are true(T) or false(F)?1.TB and flu kill millions of people every year.2.Most of dis...

时间:2024-11-20 19:56栏目:中学教育