【单选题】以下哪种病原体可通过胎盘感染胎儿引起先天性疾病
【多选题】Main characters in Moby Dick are _____.
【简答题】______is the narrator in Moby-Dick.
【单选题】( ) is the narrator of Moby Dick.
【简答题】Besides Moby Dick, Melville also wrote some other sea novels.
【多选题】Main characters in Moby Dick are _____.