3.142和3.141分别作为的近似数具有（00a0 ）位有效数字http://image.zhihuishu.com/zhs/onlineexam/ueditor/201903/7ca1a5b7391c4c0cb81ea74e2cf2335e.jpg
举一反三
- 3.142和3.141分别作为的近似数具有（）位有效数字http://image...b81ea74e2cf2335e.jpg
- 3.142和3.141分别作为π的近似数具有（ ）位有效数字。
- <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201903/2205d9f03e724a04b34f2f1045309079.png" />的幅频响应是，幅频响应是。 A: 1，<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201903/760d7fcc2f264ed1b10fb836cb48f565.png" /> B: -1，<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201903/21f685d2962e4b6993bfcaa513bdbf68.png" /> C: 2，<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201903/57267e995f86426899ce3cc0177a2343.png" /> D: 1，<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201903/ea8ba62853a94a15a5620c5165e3594a.png" />
- 中国大学MOOC: 3.142和3.141分别作为03c0的近似数具有（ ）位有效数字。
- 3.142和3.141分别作为的近似数具有（ ）位有效数字[img=59x87]17a411a9bb175e9.jpg[/img]