题目内容

图示小球D点受到的约束是（）

查看答案

搜索结果不匹配？点我反馈

更多问题

A 74LS00 chip manufactured by Fairchild Semiconductor consists of four independent NOR gates.

A. 对
B. 错

图示结构中有（）个中间铰链约束。

A signal must be at least 2V for 74LS00chip to recognize logic"1",while a signal must be no higher than 0.8V to recognize logic"0"

A. 对
B. 错

一个运动受到限制或约束的物体，称为被约束体

A. 对
B. 错