举一反三
- 从下面的华北地区雷达拼图判断未来2小时，哪个城市可能有强对流天气出现（）
- 一简谐振动的旋转矢量图如右图，设图中圆的半径为R，则该简谐振动的振动方程为<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201807/dfd995a36f4e4dd2adb52a50cc5a26de.png"/> A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201807/e69d65d5dd4e49f9863425ce3fb5ac54.png"/> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201807/b13da9634fc9435398489686c8d362f9.png"/> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201807/e7906edc65b14dc39bafcb683986a690.png"/> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201807/0bfe1b068eac44d59d8772eb9bcbf871.png"/>
- http://image.zhihuishu.com/zhs/onlineexam/ueditor/201807/d95f303f761f4007a63f2df4a3f1596f.png
- 用波长为<img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201807/f83cfabe43504aaabfed8ef51f445118.png" />的光垂直入射在一光栅上, 发现在衍射角为j 处出现缺级, 则此光栅上缝宽的最小值为 A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201807/9f827703044645dcb814a3797bff0686.png" /> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201807/689f4282749d4f79b8c3de619b87d94e.png" /> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201807/7ee1e7c994894f1fb25264c84fbaad9c.png" /> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201807/c72a2486b1304666ad4e18e4614a5f07.png" />
- 《三国演义》第四十九回“七星坛诸葛祭风，三江口周瑜纵火”中，诸葛亮向周瑜提出可借三日三夜东南大风，以助公瑾破曹。诸葛亮借的是哪个风（） A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201807/7ae07c7288d045048665b872eb883f5b.png"/> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201807/c2878ab18ac64afd9c5b528efe2c7ed2.png"/> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201807/e9c5e6054460452c92dadf2ef4093bd4.png"/> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201807/9eb59a44e3c44a408835cb05bf3890a6.png"/>
内容
- 0
图中直线是（）线。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201807/07624b15d0794d71be4237bebdff73ec.png
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此图的含义是（）http://image.zhihuishu.com/zhs/onlineexam/ueditor/201807/935c7a70dfd5400680e25c579b64dc85.png
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此图的含义是（ ）http://image.zhihuishu.com/zhs/onlineexam/ueditor/201807/59c220bc47c04322b010cff5a6d3a3fd.png
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此图的含义是()http://image.zhihuishu.com/zhs/onlineexam/ueditor/201807/74edbcfac1a74cb49bccf680c265646d.png
- 4
<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" />