4.若a>b,则下列不等式中,不成立的是( )
0 282678 282686 282692 282696 282702 282704 282708 282714 282716 282722 282728 282732 282734 282738 282744 282746 282752 282756 282758 282762 282764 282768 282770 282772 282773 282774 282776 282777 282778 282780 282782 282786 282788 282792 282794 282798 282804 282806 282812 282816 282818 282822 282828 282834 282836 282842 282846 282848 282854 282858 282864 282872 366461
| A. | a-3>b-3 | B. | -3a>-3b | C. | $\frac{a}{3}$>$\frac{b}{3}$ | D. | a+3>b+3 |