单项选择题
Boilers and cylinders are（）.
A.raw metallic products B.finished metallic products C.consumable products D.Manufactured goods of large Size
单项选择题 Tools and instruments belong to（）.
单项选择题 When loading or unloading baled cargo on board,the straps（）to lift or drag the bales.
单项选择题 Raw materials belong to（）.
