正八面体由______个面,______条棱,______个顶点组成.
正八面体有8个面,每个面都是全等的正三角形,有6个顶点,12条棱.
故答案为:8,12,6.
所有船舶至少应有消防员装备()。
A、1套
B、2套
C、4套
In the Frick Collection you can also explore Frick’s beautiful home and garden which are_____ .
A.very worth a visit
B.well worth a visit
C.well worth being visited
D.very worth visiting