乙炔瓶严禁与（）及易燃物品同车运输。
A、氮气瓶
B、二氧化碳气瓶
C、氧气瓶
D、氦气瓶
参考答案：C
In relation to the law of contract, explain and distinguish between a ‘pledge’ and a ‘hypothecation’. (10 marks)
心理分析
