The Shapes shall be black and of the following sizes :

题干

The Shapes shall be black and of the following sizes :

备

选

项

a ball shall have a diameter of not less than 0.6 m;

a cone shall have a base diameter of not less than 0.6 m and a height equal to its diameter

a cylinder shall have a diameter of at least 0.6 m and a height of twice its diameter

D

a diamond shape shall c***ist of two cones as defined in (ii) above having a common base

答案

依据

（出处）

《1972年国际海上避碰规则》附录3