[单选] According to Maritime Labour Convention, 2006, the minimum age at the time of the initial entry into force of this Convention is 16 years Night work of seafarers under the age of （）shall be prohibited.

常见的主导因素有哪些？ 乘客舒适度是反映乘客在旅途中疲劳程度的综合性生理指标，其影响因素很多，其中（）是车辆整个运行中始终存在、一直起作用的主要因素。 黄河流经的地形区，按上游至下游的顺序排列，正确的为：（） ①青藏高原 ②华北平原 ③黄土高原 ④内蒙古高原 ①②③④。 ①④③②。 ①④②③。 ②③④①。 According to Maritime Labour Convention, 2006, The minimum age at the time of the initial entry into force of this Convention is （）years. 18。 16。 22。 20。 减少分散程度，提高工序能力的措施有哪些？ According to Maritime Labour Convention, 2006, the minimum age at the time of the initial entry into force of this Convention is 16 years Night work of seafarers under the age of （）shall be prohibited.