阿摩線上測驗
18
(A) becoming infected and then getting sick again (re-infection)
(B) where the illness started sooner or later after first contact
(C) breathe in or touch these particles
(D) after the droplets have dried
(E) may be able to live
答案：登入後查看
統計： A(4), B(2), C(2), D(3), E(180) #920359
統計： A(4), B(2), C(2), D(3), E(180) #920359
