4.羊年除夕当日微信红包收发总量达80.8亿个.其中80.8亿用科学记数法可表示为( )
0 283636 283644 283650 283654 283660 283662 283666 283672 283674 283680 283686 283690 283692 283696 283702 283704 283710 283714 283716 283720 283722 283726 283728 283730 283731 283732 283734 283735 283736 283738 283740 283744 283746 283750 283752 283756 283762 283764 283770 283774 283776 283780 283786 283792 283794 283800 283804 283806 283812 283816 283822 283830 366461
| A. | 8.08×108 | B. | 0.808×109 | C. | 8.08×109 | D. | 0.808×1010 |