单边拉氏变换<img src="https://static.zxtiku.com/wangke/imgs/topic/622ac874a4698fb78bd9b8399a423564.jpg"/>的原函数<img src="https://static.zxtiku.com/wangke/imgs/topic/022b0da09b3a420799ce97af3a9a7219.jpg"/>为（）。<br/> A. <img src="https://static.zxtiku.com/wangke/imgs/topic/61d066999db3289216ef4914c69f704d.jpg"/> B. <img src="https://static.zxtiku.com/wangke/imgs/topic/32b79c9d7176b8113e6ae312639bccf4.jpg"/> C. <img src="https://static.zxtiku.com/wangke/imgs/topic/0c142e98c46af821df989ee111c06539.jpg"/> D. <img src="https://static.zxtiku.com/wangke/imgs/topic/bca7d5a9290c09f4b315f1a88e52a6d7.jpg"/>