簡述效力待定民事法律行為的法律后果。
Manypeopleattendvariouspubliclectures,chiefly______themselvesfamiliarwiththelatestdevelopmentofdifferentfields.
設冪級數(shù)的收斂區(qū)間為(-2,6),
的收斂區(qū)間為()
f(x,y)=y根號1-x2+s f(x,y)dxdy其中D=(x,y),則
Weallthinkthat_____noneedtomakelawstopreventtheyoungfromgettingmarriedduringtheircollegelife.