英语数字6,500,431,729读成____________.
A.six billion ,five hundred million, four hundred and thirty-one thousand, seven hundred and twenty –nine. |
B.six thousand and five hundred million, four hundred and thirty-one thousand, seven hundred and twenty –nine. |
C.six billion ,five hundred million, four thousand, three hundred and seventeen hundred and twenty –nine. |
D.six thousand and five hundred billion four hundred and thirty-one thousand, seven hundred and twenty –nine. |