题目内容

摩擦系数对圆柱体正挤压变形力影响很大，若摩擦系数均为零，则变形力只与变形程度有关。

A. 对
B. 错

查看答案

搜索结果不匹配？点我反馈

更多问题

将某线性规划问题模型化为标准型时，如果某决策变量x1是自由变量，应该将该变量替换为。

在化标准型时，需要将不等式约束条件化为等式，在不等式约束条件中增加剩余变量或松弛变量，这些剩余变量或松弛变量在目标函数的系数是。

We arrived too late for the concert, just as the musicians were already packing ___ their instruments.

A. up
B. in
C. with
D. on

In extreme sports (such as parachuting), you take the risk that you may wind ____ seriously injured or even dead.

A. in
B. up
C. with
D. on