Which is the hidden weapon that Lincoln employed to fight with Confederate Army and finally achieved the reunion of the nation?
A.Will-powered soldiers
B.military tactics
C.railroad
D.personal charm
正确答案:railroad
Which is the hidden weapon that Lincoln employed to fight with Confederate Army and finally achieved the reunion of the nation?
A.Will-powered soldiers
B.military tactics
C.railroad
D.personal charm
正确答案:railroad