I was a bit confused on where I was going.
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We did not know the building we were supposed to go to, but the guard was very nice.
A. 对
B. 错
复合材料是由两种或者两种以上物理和化学性质不同的物质组合而成的一种多相固体材料。( )
A. 对
B. 错
复合材料命名有统一的命名方法。( )
A. 对
B. 错
复合材料一般是根据增强体和基体的名称来命名的。( )
A. 对
B. 错