题目内容

工业纯铝常含有Fe、Si 等杂质,杂质含量愈多,其导电、热及抗大气腐蚀性能愈低。()

A. 对
B. 错

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巴氏合金的组织为软基体上分布着硬质点。( )

A. 对
B. 错

Such ______________ (decorate) is a typical feature of the Baroque period.

Here is my passport for __________________ (identify).

Her mother sat there , _______________(word) , staring at the wall.

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