易恶变的肿瘤为()
A.化牙骨质纤维瘤
B.纤维骨瘤
C.骨化纤维瘤
D.牙骨质母细胞瘤
E.骨纤维结构不良
参考答案:E
浓HNO3和铜反应,如0.5mol的电子发生了转移,则被氧化的铜的质量是( )。
A.16g
B.32g
C.3.2g
D.1.6g
32. I ____ what he said, but I don’t _____ him.
A.believe, believe in
B.trust, believe
C.believe in, credit
D.depend on, believe in