下列化学用语表示2个氢原子的是[ ]
A.H2
B.2H
C.2H2
D.2H+
答案:B
Peter ________ up at six o'clock every morning. [ ]
A. gets
B. get
C. is getting
可出现甲状腺肿大伴震颤及血管杂音的是()
A.单纯性甲状腺肿
B.甲状腺功能亢进症
C.甲状腺腺瘤
D.甲状腺癌
E.慢性淋巴细胞性甲状腺炎