【简答题】人脸识别门禁一体机是通过摄像机镜头来捕捉人脸信息。该摄像机镜头相当于(1) ___ 透镜,它的成像与(2) _______ (选填“照相机”“投影仪”或“放大镜”)相似,所成的是(3) _____ (选填 “放大”“缩小”或“等大”)的实像,已知镜头焦距为 f ,人脸到镜头的距离应大于(4) ______. 要使屏幕上的像大些,人应离镜头(5) _______ (选填“远”或“近”)些。
【简答题】What does “the icy defender” refer to?
【简答题】What does "the icy defender" refer to ?
【判断题】并联电路中各支路上的电流不一定相等。()
【简答题】What does "the icy defender" refer to?
【单选题】“The icy defender” refers to the Russian river.
【判断题】“The icy defender” refers to the Russian river .
【单选题】如图,是人脸识别门禁一体机,通过摄像镜头来捕捉人脸信息。若镜头的焦距为10cm,为了能成清晰的像,人脸到镜头的距离应大于多少厘米?