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Biology 21 Online
OpenStudy (anonymous):

In 1971, Stephanie Kwolek patented Kevlar, a fiber that can be woven into armor-like fabric that is ___ to most bullets. A. devious B. impervious C. transient D. transitive

OpenStudy (gebooors):

Bullets does not pierce kevlar armor, so what is right word? Sorry my bad English

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