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下列四组线段中,能构成比例线段的是A.1cm,2cm,3cm,4cmB.4cm,5cm,6...
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下列四组线段中,能构成比例线段的是( )
A.1cm,2cm,3cm,4cm
B.4cm,5cm,6cm,7cm
C.1cm,
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAA8AAAASCAYAAACEnoQPAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAC/SURBVDhPzZNBEsUQEETnXBaOY+8m1g5iOwfJ
wlH6ZwRJ8ItklVSpQmn9picIg4+IsDT+iUf77R59XMz2zEB7xIw7x44e2nI+zrASZl5PxZG5OskN
0WtQdp+Ku0ClhFXnVsyWUKp45nyrH3ggjvDaokQnRIRgchtMJZRfs8fV8KVHpVUhhDR1iqDcluat
WBKu3ZIDe2iyPi0SweF+FUtA/SM58G98ZscV9xH28A1cNzenQMq9E8tF4v7KuVCsin81ApctPDAe
KwAAAABJRU5ErkJggg==
)
m,2
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAA8AAAASCAYAAACEnoQPAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAC/SURBVDhPzZNBEsUQEETnXBaOY+8m1g5iOwfJ
wlH6ZwRJ8ItklVSpQmn9picIg4+IsDT+iUf77R59XMz2zEB7xIw7x44e2nI+zrASZl5PxZG5OskN
0WtQdp+Ku0ClhFXnVsyWUKp45nyrH3ggjvDaokQnRIRgchtMJZRfs8fV8KVHpVUhhDR1iqDcluat
WBKu3ZIDe2iyPi0SweF+FUtA/SM58G98ZscV9xH28A1cNzenQMq9E8tF4v7KuVCsin81ApctPDAe
KwAAAABJRU5ErkJggg==
)
m,4cm
D.2cm,2
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAA8AAAASCAYAAACEnoQPAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAACySURBVDhPzZO5EcMgEEW3LgLKId9OiCmElEIU
UMq3lsOAjTRrRWaGhOH9Y5EIm0VEUO0reHf+eUb/D+dgxxxsQD4jK2MncAPmmjo4MTh9T0cBZwTb
n44xayjg4ZhYRCyCFNZ3HgJlcK3DT85VYgyPEF17AveWl0/zep1wd44xlnveEIw/apcbOPGuc0lQ
3Rc4B9jpR5mfbMnnzkvifh97FFrgwxuQ8c9g0RT3R849kBZ+AeaPnaoEN+d7AAAAAElFTkSuQmCC
)
cm,
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABYAAAASCAYAAABfJS4tAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAADOSURBVDhP3ZRLDsQgCIY5lwuP456buPYgbj1I
Fx6FEcbHTMWknboakiaNyscPiECKAQA9/lZgbf3OGvwxOAeyYCnkOccc7OiJDcRHrpUiYXXUwImw
wj5DXgOLRwFoiktQTHMWD8GZgm1XE0voYQ/BA5SQA4xSbQNzCGlirctWsPSh34roasddz4vHebZF
874OljNNcYxRtrwBMv6Q/1/BCbUai/K36gkswzEepn69VuvnAXHFmVXriu88QafJO7whMH4/mDWx
6u2KW7I7wC8R1lS6QtNXLwAAAABJRU5ErkJggg==
)
cm,12cm
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