She wants_________ to America. [ ]
A. fly
B. flies
C. to fly
答案:C
什么叫熔化系数?手弧焊熔化系数为多少?
好发于颈正中线、舌骨上下的囊肿()
A.皮脂腺囊肿
B.皮样或表皮样囊肿
C.甲状舌管囊肿
D.腮裂囊肿
E.舌下囊肿