We strongly advise you ______ eating your meal so late. It's not healthy.
A:on
B:against
C:from
D:over
下列函数在其定义域内不是连续函数的是( )
判断句子正误。
①DN⊥MC;②DN垂直平分MC;③sin∠OCD= 1213 ;④S△ODC=S四边形BMON中,
正确的有____(填写序号)