题目

Though Brazil is one of the richest countries in the world, much of it has not yet been developed. It was mainly for this reason ____61______ the Brazilian government decided to have a new city ___62_______(build) 600 miles north-west of Rio de Janeiro. Designed by the great architect Lucio Costa, the new city, Brasilia, replaced Rio de Janeiro as the capital of Brazil in 1960. Brasilia has been _____63_________(careful) planned for modern living. Its wide roads, which can take fourteen lanes of traffic, have been kept away from ___64________(live) areas. Children do not have to cross bus 已知之间的一组数据如表所示，对于表中数据，现在给出如下拟合直线，则根据最小二乘法思想判断拟合程度最好的直线是（   ） 2 3 4 5 6 3 4 6 8 9 A． B． C． D．