题目内容

相贯线的性质有以下哪些()。

A. 表面性
B. 共有性
C. 封闭性
D. 连接性

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两立体相交,在其表面形成的交线称为相贯线。

A. 对
B. 错

assessment often includes two kinds: ___ assessment and _____ assessment.

_____ assessment is mainly based on formal testing.

Summative assessment mainly measures:

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