甲、乙两根矩形截面梁,混凝土强度等级和截面尺寸均相等,正截面受拉钢筋的配筋率分别为<img src="https://zk.995w.com/lqwvjeImg/ba/bab3db95e0df032029286883c4c47717.png" style="font-size: 20px;" >,则关于它们的正截面开裂弯矩<img src="https://zk.995w.com/lqwvjeImg/cc/cc56c8713eba8f7d4d4edc4b982473da.png" style="font-size: 0.85rem; width: 29px; height: 24px;" >和正截面极限弯矩<img src="https://zk.995w.com/lqwvjeImg/62/62a64e3475d0e96aab4d2281945da019.png" style="font-size: 0.85rem; width: 25px; height: 24px;" >,下列说法正确的是( )<br>·甲梁的<img src="https://zk.995w.com/lqwvjeImg/ac/ac13678ff03c6d241dae43f99e8deec7.png"style="width:61px;height:24px;">大<br>·乙梁的<img src="https://zk.995w.com/lqwvjeImg/ac/ac13678ff03c6d241dae43f99e8deec7.png"style="width:61px;height:24px;">大<br>·两者的<img src="https://zk.995w.com/lqwvjeImg/ac/ac13678ff03c6d241dae43f99e8deec7.png"style="width:61px;height:24px;">一样大<br>·无法判断