Compared to internal structural plating，the exterior hull plating on a ship is usually（）.<br>A:stronger<br>B:thinner<br>C:more corrosion resistant<br>D:a lower grade steel

Compared to internal structural plating，the exterior hull plating on a ship is usually（）.
A:stronger
B:thinner
C:more corrosion resistant
D:a lower grade steel

出自：海船船员证

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