设一两个自由度体系有两个质量相同的质点,其两个主振型为:( )http://image.zhihuishu.com/zhs/onlineexam/ueditor/201809/9062046b36db4072b6df3967be8f2d8d.png
举一反三
- n个变量的逻辑函数一共有最小项( )个。 A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201809/bc6b2e9c189248feb007810275b3ba46.png" /> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201809/a04259d5f82c487eb3fe219bdfe142fd.png" /> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201809/994cb971d6b0496e97023da8982c9ee1.png" /> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201809/c7dc4e3adc954375b97a1f5f805272cc.png" />
- 设一两个自由度体系有两个质量相同的质点,其两个主振型为:( )[img=511x390]17a3da975604773.png[/img]
- 设一两个自由度体系有两个质量相同的质点,其两个主振型为:( )[img=511x390]17a3daca27414bc.png[/img]
- 设一两个自由度体系有两个质量相同的质点,其两个主振型为:( )[img=511x390]1786a0f2db35bf4.png[/img] A: A B: B C: C D: D
- 两个质量相同的物体分别挂在两个不同的弹簧下端,弹簧的伸长分别为和 ,且,两弹簧振子的周期之比T1:T2 为( )http://image.zhihuishu.com/zhs/onlineexam/ueditor/201904/227a0877c83f4846886fdf03d82a73db.png