• 2022-06-04
    过已知点作实长为[tex=2.786x1.0]17Ub2PYC2UdUgd2I7oPk+Q==[/tex]的线段的三面投影。作侧垂线[tex=1.429x1.0]DZcwY2TNV/IV6o1LFpBZgA==[/tex][img=522x430]17ade59fb89bb84.png[/img]