3.2-4-1、<img src="https://static.zxtiku.com/wangke/imgs/topic/c3a03eee8a758d1ccc8ca48139001e08.jpg"/>和<img src="https://static.zxtiku.com/wangke/imgs/topic/819b26e16256b4aa32366985ed2ebc0b.jpg"/>的卷积为（）。 A. <br /> <br /> <img src="https://static.zxtiku.com/wangke/imgs/topic/6d16c673ed0faea376d8fc893f06fa46.jpg"/> B. <br /> <br /> <img src="https://static.zxtiku.com/wangke/imgs/topic/84a8caa8dd86661d043d52fba9fecf41.jpg"/> C. <br /> <br /> <img src="https://static.zxtiku.com/wangke/imgs/topic/e69cb2ede03927e4a1c3744a3a692278.jpg"/> D. <br /> <br /> <img src="https://static.zxtiku.com/wangke/imgs/topic/ef2451109529c10eb9892ba92caa8059.jpg"/>