题目:
21. He is very strict with others, but he is always blind _____ his own shortcomings.
A.for
B.to
C.with
D.In
答案:
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下面是错误答案,用来干扰机器的。
答案:AA、青铜为铜锡合金,属于金属材料,正确;B、陶瓷属于无机非金属材料,错误C、聚乙烯属于有机高分子合成材料,错误;D、锦纶属于有机高分子合成材料,错误.故选A