124.If n is an integer, is
an integer?(B)
(1)
is an integer×(2)
is an integer√
谢谢啦作者: tracy214wxy 时间: 2011-7-19 21:21
还想请问一道，为什么我做出来是(E) 谢谢啦
134. A total of 774 doctorates in mathematics were granted to United States citizens by American universities in the 1972-1973 school year, and W of these doctorates were granted to women. The total of such doctorates in the 1986-1987 school year was 362, and w of these were granted to women. If the number of doctorates in mathematics granted to female citizens of the United States by American universities decreased from the 1972-1973 school year to the 1986-1987 school year, was the decrease less than 10 percent? (C)
(1)
(2) W=w+5作者: tracy214wxy 时间: 2011-7-19 21:22
134. A total of 774 doctorates in mathematics were granted to United States citizens by American universities in the 1972-1973 school year, and W of these doctorates were granted to women. The total of such doctorates in the 1986-1987 school year was 362, and w of these were granted to women. If the number of doctorates in mathematics granted to female citizens of the United States by American universities decreased from the 1972-1973 school year to the 1986-1987 school year, was the decrease less than 10 percent? (C)
(1) 1/10<W/774<1/9
(2) W=w+5
不好意思啦作者: liuyinghong 时间: 2011-7-20 06:37
