我国法律有“母法”与“子法”之分。下列选项中体现这一关系的是[ ]
A.教育法与未成年人保护法
B.婚姻法与计划生育法
C.宪法与民法通则
D.专利法与知识产权保护法
答案:C
27. Now and then they would ______ our house and have a talk with us.
A.call on
B.drop in at
C.drop in on
D.drop in
太阳辐射能量来源于太阳内部的()
A.核裂变反应
B.核聚变反应
C.耀斑爆发
D.太阳风