r=70/2=35cm,h=120cm纵切:(两个半圆柱)2个半圆柱表面积 和=2(πr²+πrh+2rh)=2(3.14*35²+3.14*35*120+2*35*120)=25434.5cm²横切:(两个圆柱)两个圆柱表面积 和=4πr²+2πrh=2πr(2r+h)=6.28*35(70+120)=41762cm²