A:shopped
B:have shopped
C:had shopped
D:were shopping
如图,一个底面圆周长为24m,高为5m的圆柱体,一只蚂蚁沿侧表面从点A到点B所经过的最短路线长为( )
“金蝉脱壳”的本意是指昆虫( )