海底火山-气液矿床层状矿体的()围岩热液蚀变不发育。
参考答案:上部
One of the most important questions they had to consider was _________ of public health.
A.what
B.this
C.which
D.that
支气管癌主要转移到下列哪些部位()
A.肝脏
B.脑部
C.肾上腺
D.性腺
E.骨骼