一个稳定的线性时不变因果系统的系统函数H（z）的收敛域为（ ）。
A:
B:
C:
D:
A:
B:
C:
D:
举一反三
- 函数<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202008/80d8f8a04b644504a6d2e40a33d0eb32.png" >的<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202008/4b92518ac6a14134a358c16900e875c0.png" >阶麦克劳林公式为（） A: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202008/7c2994f9242c43379c6a106d5bd92658.png" >； B: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202008/2145f14f27224b189e702d3390e0a9ba.png" > C: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202008/9ef01b77e76241d9b67b1c7c8cd0eea1.png" >； D: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202008/a0feec59ac5046839ecb5324b27717e0.png" >；
- 对于下列已达平衡的反应体系，若压缩容器体积，增加体系总压力，平衡正向移动的是（ ）。 A: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202008/326095eaba6d40a3bc4057c25f7eae82.png" /><img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202008/d5573e1b78574bdf970effa5e9509ef4.png" /><img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202008/c8f59ca38f9a41db94d913281b203ada.png" /> B: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202008/41aeceac712749ada229b477082c26aa.png" /> <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202008/d5573e1b78574bdf970effa5e9509ef4.png" /> <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202008/0084729e370b40eab5afb29706560d04.png" /> C: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202008/f92df5cfb06d4322aca5548a0937215a.png" /><img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202008/d5573e1b78574bdf970effa5e9509ef4.png" /><img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202008/8fd7733b85054932be29f9c24c10f538.png" /> D: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202008/bfdf951768ce48989962f5ffbf5b8a97.png" /><img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202008/d5573e1b78574bdf970effa5e9509ef4.png" /><img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202008/6661619fa794442781036239c942bac3.png" />
- 下列哪些函数是有界函数？（ ）。 A: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202008/05409d34ce2646f08c712657394fb734.png"> B: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202008/e14c23bb450d4c6d83c3375874b8b637.png"> C: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202008/ea3e66cf540147df8d6d46fd338abe96.png"> D: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202008/f6a41b949119440c99d76758c53da367.png">
- 正确的三视图是（） A: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202008/c79f2d3b8b124d6bb11333e89314a924.png" > B: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202008/da6b6dd5a32947f3825ccbbb9b0fb0c5.png" > C: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202008/307f865d705d43f39bcd26e3ccc6dad7.png" > D: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202008/e8dafd24df684f4a8223d230ce78a2b8.png" >
- 如果一个氢原子的电离能是<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202008/4dcf071313154d0ea93225d9a406e985.png" />， 则一个<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202008/c89b325c3d164b7d9865e00605b006ca.png" /> 离子的电离能为（ ）。 A: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202008/85d5e9042a93497abfa3bb96856e78d2.png" /> B: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202008/4dcf071313154d0ea93225d9a406e985.png" /> C: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202008/411f7e2e2ee84fe4982c3fad6b02ce4f.png" /> D: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202008/4da15d5c01a442eb9bcb6fc2fd30f12e.png" />