单项选择题

下列关于极惯性矩的影响因素正确的是 A. 与杆件材料有关，与杆件横截面几何形状、力作用方式无关 B. 与杆件横截面几何形状、横截面大小有关，与杆件材料无关 C. 与力作用方式有关，与杆件材料、杆件横截面几何形状无关 D. 与杆件材料、力作用方式、杆件横截面几何形状无关

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There is a darker what-if. What if history is too forceful to redirect? What if jiggering the engine produces no favorable outcome — merely a postponement of the inevitable? If he had lived, Kennedy might not have escalated the war in Vietnam, and might have kept America out of a bloody mire. But we don’t know. What if we were headed there anyway? Then our tampering might only make things worse. It is not historical inevitability, but something close.

答案： {}

关于支持向量机，下列说法正确的选项是？（）

答案：正确答案：对于复杂的非线性的决策边界的建模能力高度准确，并且也不太容易过拟合