摩托车 Pop Quiz

Magnesium makes for light, strong alloys, great for bike applications. But what 更多 practical reason is it not used for production motorcycle wheels?
Choose the right answer:
Option A The ore is too costly.
Option B Its alloys tend to be porous, causing tire deflation if paint is damaged.
Option C It cannot be cast cheaply enough for motorcycle wheels.
Option D It's prone to burn extremely hot if abraded.
 kinakomochi posted 一年多以前
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