从病因作用于机体到疾病最初症状出现前的一段时间:( ) A.
潜伏期 B.
前驱期 C.
症状明显期 D.
转归期

A．5P/16
B．7P/16
C．3P/16
D．9P/16

A．While she spoke, the tears were running down.
B．Once she spoke, the tears were running down.