如果圆柱的高为4cm,底面半径为3cm,那么这个圆柱的侧面积是______cm2
根据侧面积公式可得π×2×3×4=24πcm2.
一What are you going to do this weekend?
一Well,we’ll clean up the city parks _______ it rains .
A.if
B.until
C.while
D.unless
胡亚雷斯改革