单项选择题
Neglecting friction, you desire to life a 300 kgs weight with a stress on the hauling part of 100kgs.Which of the following tackles would you use ?（）.
A.Gun tackle B.Luff tackle C.Toe-fold tackle D.Double-luff tackle
单项选择题 Never（）stowed like this.
单项选择题 0f the following, the most important consideration for a tank vessel is（）.
单项选择题 0f the general methods of stowing bagged cargo, which allows maximum ventilation?（）.
