题目内容：
桥梁按上部结构的行车道位置，分为（ ）。
A．公路桥 B．铁路桥
C．上承式桥
D．下承式桥
E．中承式桥
参考答案：
答案解析：
多选题：桥梁按上部结构的行车道位置，分为（ ）。
- 题目分类：公路工程
- 题目类型：多选题
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B．铁路桥
C．上承式桥
D．下承式桥
E．中承式桥
B．铁路桥
C．上承式桥
D．下承式桥
E．中承式桥
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