判断题
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振动系统力学模型的基本单元是刚度、质量和________。
问答题振动系统力学模型的基本单元是刚度、质量和________。
Pip is the major character in Dickens'novel Our Mutual ...
单项选择题 Pip is the major character in Dickens'novel Our Mutual Friend. A. 对 B. 错
Surely they can _______ their differences without resor...
单项选择题Surely they can _______ their differences without resorting to legal action. A、reconciled B、 irreconcilable C、conflict D、reconcile