已知圆锥底面半径为5cm,母线长为15cm,那么它的侧面积为______cm2(结果保留π)
∵r=5cm,l=15cm,
∴S侧=πrl=75πcm2.
故答案为:75π
强化食品的种类有()
A.膳食补充剂的添补,副食强化
B.载体的选择,副食强化
C.主食强化,副食强化
D.水强化,副食强化
E.固体强化,副食强化
Many people are _______ in the _______ story. [ ]
A. interesting; interesting
B. interested; interested
C. interested; interesting
D. interesting; interested