下面那一个图可一笔画出（）。
A:
B:
C:
D:
A:
B:
C:
D:
举一反三
- 理想低通滤波器的传输函数<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202002/980b5b2a8d7044b697bc516003ea3acb.png" >是()。 A: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202002/9a82e2e4ff27470da538512097ee6438.png" > B: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202002/c079877bd52d471db3cd6e163f62adbb.png" > C: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202002/52aa9898f12641d797c40e4d118bd733.png" > D: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202002/a7815d7407f34172aeef470a6adc5f47.png" >
- 单边拉普拉斯变换<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202002/423a53f9b3bf40989454133dbce2d262.png" >的原函数等于（）。 A: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202002/301dd2111ac64b0e8217cba94ba1a1ab.png" > B: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202002/9772eee6eab34c208eba55009d00041b.png" > C: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202002/42bfb5f864e34b5ca02a2a1cc9d9c71b.png" > D: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202002/659eef6ba24b490191772fe51bab3c9a.png" >
- <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202002/f9d435b7e7604d1894a0359bb77eb2cc.png" >可写成以下正确的的表达式是（） A: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202002/e68f9f4bb1b640068bd1c9e988b3feca.png" > B: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202002/1b379e5c6cd74b5da61e39e4ca32ad22.png" > C: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202002/44f6ba8e2d6448f4bec35063ad0f689f.png" > D: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202002/e25be7e84d1e4f358bb44dacefafd393.png" >
- 下面命题公式（）不是重言式。 A: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202002/bad0365bb4ca4e1881dc14640ea47948.png" > B: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202002/7ecbabf41ddd44cc8f13850ca398b0a8.png" > C: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202002/9119b7a1784e4e8d96a504ca5526afd3.png" > D: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202002/7a5be82f20bf418fb65b6946d47061e7.png" >
- 为求方程<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202002/ce3ea4db5573483a89d1d732d75e1036.png" >在<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202002/31ea0f26a7064e83856e0c3a268aa9c5.png" >附近的根，则使得迭代格式<img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202002/2cb16d8f43544cca8adc73fc7dce0dff.png" >一定局部收敛的迭代函数为() A: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202002/c52ae5e1d8ca4c51ac71ad740e0bb231.png" > B: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202002/54a5d832d2544db7905c50c2c7287f09.png" > C: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202002/cdecd203bf8049c5b3faccb7e68a42aa.png" > D: <img src="https://image.zhihuishu.com/zhs/doctrans/docx2html/202002/4a5e9a33f10e4d489df882c59db1d545.png" >