A:①④
B:①③④
C:②③④
D:①②③④
The two office buildings ____ in size and shape.
以下实际应用中,没有用到磁性材料的是( )
The teacher tells us that ______ careful we are, ______ mistakes we will make.
下列省区与简称,行政中心的连线正确的是( )