举一反三
- 用公式法将下列函数化简为最简与或式，正确答案为（）。https://image.zhihuishu.com/zhs/onlineexam/ueditor/201908/b5f7af26e5d840d4bc811fc52ab1fcd0.gif
- 用卡诺图化简法化简下列各式，结果正确的是（ ）。 A: B: C: D:
- 在纯电容电路中，电压和电流的关系应为（ ）。 A: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201908/3e829c34dee64700a6d7c47703fac813.png"> B: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201908/76f4755b138c42dcb27c8c006369dd09.png"> C: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201908/99d49adf0f7142ef91f9c78e42ba24b0.png"> D: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201908/d5322333240046d382b302f48318d1cb.png"> E: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201908/c5689885a941415493404a53dbf5e03b.png">
- 应用卡诺图化简下列各式(1)；(2)；(3)；(4)。应用卡诺图化简下列各式
- 图示应力圆对应于应力状态<img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201908/a61d48f304e9454fb6f3d8fcac0a5888.png" /> A: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201908/fa83fd043ee946869755b338236b2b0e.png" /> B: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201908/77ff74928a3642928e805440db706068.png" /> C: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201908/6cce8e25b7ec4d00895cd86fabc16f64.png" /> D: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201908/62d9a4357886450cbfb0bde0deda67ec.png" />
内容
- 0
下列各对函数中，两函数相同的是（ ） A: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201908/005a115bac08495eb95962c7071a78f1.png"> B: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201908/a527471aab444488884fca1d17d9d400.png"> C: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201908/3a0e26b4b4f44ceaa2ac479ce599077d.png"> D: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201908/3430e6031b074123a928985c91d4bf44.png">
- 1
下列电化学系统的热力学基本方程的表述正确的是( )。 A: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201908/be1d9f218f2f42eca295fa5653bbc08d.png" /> B: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201908/187ddd7f63954f3b8fb58e2d9b96af44.png" /> C: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201908/d8fecf18430d48f8973eca25eb396bc3.png" />
- 2
欠阻尼二阶系统的闭环极点分布图为（ ）。 A: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201908/e26de5d73f984ba391a6ac30d8c6d4fe.png" /> B: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201908/11aa916316d34c4eb0ae8cafd3bdaeb0.png" /> C: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201908/31e7b12aeb2e427f882a4b430c6f6d94.png" /> D: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201908/aa587a3419434ed38f3114ee0eeaba96.png" />
- 3
在纯电感电路中，电压应为（）。 A: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201908/fe9a2726638343cf8f66ce58ca5146cc.png"> B: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201908/0f360aa88e6d4c1993733df279cd3734.png"> C: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201908/08dcf081ff844b1e92735fc0b9d1a227.png"> D: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201908/344144b6bd8f4089899e73bd6daadc00.png">
- 4
沿着相反方向传播的两列相干波，其表达式为和<img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201908/cb9dabe78a5348b0837b3b767f063330.png" />。叠加后形成的驻波中，波节的位置坐标为（ ）。选项各式中的k= 0，1，2，3, … A: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201908/0d350e40584140deaee675a9bdcb1c1b.png" /> B: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201908/9726259c96e14ab5b9a943b3958b27c1.png" /> C: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201908/94708602df6041818d917ad995b82a96.png" /> D: <img src="https://image.zhihuishu.com/zhs/onlineexam/ueditor/201908/cfb68165791b424da78c60801a5e8a8f.png" />