骨肿瘤的骨质破坏包括（）、（）两类。
参考答案：成骨性；溶骨性
Don’t keep silence! The head teacher is ___________a lot about that.
A．able to know
B．supposed to know
C．supposing to know
D．going to know
恶性肿瘤的血行转移常见部位是哪些脏器?
