假体腔来源于中胚层()
参考答案:错
Tom is very _____ his new mobile phone and he always shows it to others. [ ]
A. proud of
B. good at
C. interested in
D. famous for
下列关于轮状病毒的描述错误的是()
A.可分为A-G7个组
B.主要侵犯结肠的微绒毛上皮细胞
C.为RNA病毒
D.属呼肠病毒科
E.感染人的RV主要是A组和B组人RV