一个圆柱和圆锥等底等高,体积相差21立方厘米,圆锥的体积是7立方厘米______.(判断对错)
21÷2=212(立方厘米);
答:圆锥的体积是212立方厘米.
故答案为:×.
9.China Tourism Day should fall on 15th, July, according to Sichuan people,______Deng Xiaoping paid a visit to Mount Emei, and made an important speech on tourism.
A.which
B.on which
C.of whom
D.Who
凡是以直素线为母线,相邻两条直素线能构成一()时(即两直素线()或())的曲面,都是可展表面。