题目钢筋混凝土简支板桥的主钢筋直径应不小于多少毫米?A. 10mmB. 16mmC. 12mmD. 14mm钢筋混凝土简支板桥的主钢筋直径应不小于多少毫米?A. 10mmB. 16mmC. 12mmD. 14mm题目解答答案A. 10mm