题目

桃肉、西瓜子、葵花子分别是由下列哪项发育而来的（） A . 子房、子房壁、胚珠 B . 子房、胚珠、子房壁 C . 子房壁、胚珠、子房 D . 胚珠、子房、子房壁 答案：CThe warning of the storm, ______ over the radio and on TV, spread quickly through the province.A.broadcastingB.having broadcastC.broadcastD.to be broadcast