船舶在海上遭遇自然灾害或其他意外事故，所造成的灾难称为（）
A.海损
B.海难
C.海上险情
参考答案：B
I'm not surprised that he became a writer. Even as a child he had a ________ imagination.[ ]
A. clear
B. cautious
C. funny
D. vivid
可以作为加强筋的材料有（）
A、木材
B、泡沫塑料
C、扁钢
D、方管
s a child he had a ________ imagination.[ ]