There_________ two lights and a blackboard in our classroom. [ ]
A. are
B. is
C. isn't
答案:A
急躁易怒,汗出心悸,手足震颤,可能是()
A.甲状腺囊肿
B.腺瘤囊内出血
C.甲状腺腺瘤
D.合并甲亢
E.癌变