[单选题]
A 10-m uniform beam of weight2,)my.n- tyzng )owi)abfv:s 100;;xampoi(dn , py78o bc jw)jw5 at7r/ N is supported by two ropes at the ends. If a 400-N person sits at 2.0 m from the left expwj/aw )(or ;j 5cdit 8aymb;n7o7p,nd of the beam, what is the tension in the left rope?
