The radar control that shortens all echoes on the display and reduces clutter caused by rain or snow is the（）.
- Asensitivity time control (sea clutter control)
- Breceiver gain control
- Cbrilliance control
- Dfast time constant (differentiator)
问题
The radar control that shortens all ec
参考解析：
分类：雷达及ARPA的使用题库
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