三角形的内角和是180度.______.(判断对错)
由三角和定理可得:三角形的内角和是180度,
故答案为:√.
Great changes _____in my hometown in the past few years.
have taken place B.have been taken place C.took place D.were taken place
在城市道路设计中,建筑物内开设的消防车道,净高与净宽应大于或等于( )。
A.3m
B.4m
C.5m
D.80m