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Most ceramic materials have high hardness and high-temperature strength but tend to be（）.
Most ceramic materials have high hardness and high-temperature strength but tend to be（）.
正确答案：brittle
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材料概论
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Ceramic materials are（）materials that consist of metallic and nonmetallic elements chemically bonded together.
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Metals are commonly divided into two classes:（）metal and（）metals.