We want such materials can bear high temperature and pressure.A. thatB. asC. whatD. whic

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A. that
(答案→)B. as
C. what
D. which
解析：such materials as 引导的是定语从句,as 在从句中作主语；而such materials that 引导的是结果状语从句，that 在从句中不充当成分。