14.一个圆柱底面直径是0.5米,高1.8米,它的侧面积为( )平方米.
0 157967 157975 157981 157985 157991 157993 157997 158003 158005 158011 158017 158021 158023 158027 158033 158035 158041 158045 158047 158051 158053 158057 158059 158061 158062 158063 158065 158066 158067 158069 158071 158075 158077 158081 158083 158087 158093 158095 158101 158105 158107 158111 158117 158123 158125 158131 158135 158137 158143 158147 158153 158161 199269
A. | 9 | B. | 2.826 | C. | 8.478 |