方程x2-4=0的解是______.
x2-4=0,
移项得:x2=4,
两边直接开平方得:x=±2,
故答案为:±2.
()is the state church in England.
A. The Roman Catholic Church
B. The Baptist Church
C. The Protestant Church
D. The Church of England
供电部门进行维修天窗中的项目作业时,应在什么簿中登记?