选择题:The assistant spoke to Edith because she seemed___

题目内容:
The assistant spoke to Edith because she seemed_______.( )(本题2.5分)
A、 attractive
B、 interested in ties
C、 tired
D、 in need of comfort
参考答案:

系统数学模型是描述系统输入、输出及系统内部变量之间关系的数学表达式。( )(本题4.0分)A. 正确

系统数学模型是描述系统输入、输出及系统内部变量之间关系的数学表达式。( )(本题4.0分)A. 正确B. 错误

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