A-A+
A tunnel would be______.A．less expensive to be
问题详情
A tunnel would be______.
A．less expensive to be built than a bridge
B．more expensive to be built than a bridge
C．less expensive to be built than a rail
D．more expensive to be built than a rail
参考答案
正确答案：A
解析：本题考查的是考生对细节的把握。答案对应于文章的第二段，其中提到“建桥的成本比建隧道高得多”，所以选A。
