Dde^ so^ng Ho^`ng

[Dam Son <son@fermi.phys.washington.edu>]

Hi,

Nghe ca'c ba'c ba`n ve^` chuye^.n dde^, to^i co' mo^.t ca^u ho?i\. Co' 
mo^.t ngu+o+`i ba.n cu?a to^i no'i ra(`ng dda'y so^ng Ho^`ng cao ho+n 
dda^'t be^n ngoa`i dde^!  Xem so+ ddo^` sau:

                    ___                   ___
                   /   \                 /   \
                  /     \---------------/     \
                 /       \   nu+o+'c   /       \
                /         \___________/         \
ddo^`ng ba(`ng /                                 \  ddo^`ng ba(`ng
______________/                                   \________________


Tu+'c la` ne^'p pha' dde^ ddi thi` so^ng Ho^`ng se~ bie^'n tha`nh vu`ng
dda^'t cao!  Tuy nhie^n to^i nghi ngu+o+`i ba.n to^i bi.a la('m.  Va^.y
muo^'n ho?i ca'c ba'c na`o co' kie^'n thu+'c ve^` thu?y lo+.i xem ddie^`u
ba.n to^i no'i la` ddu'ng hay sai\. 

Xin ca'm o+n tru+o+'c nhie^`u\.

So+n.