66. 5428-!-item-!-187;#058&004588
In the finite sequence of positive integers K1, K2, K3, . . . , K9, each term after the second is the sum of the two terms immediately preceding it. If K5 = 18, what is the value of K9 ?(D)
(1) K4 = 11
(2) K6 = 29 请问化红字的部分 是什么意思?难道是 K2=K3+K4吗?觉得不太可能 64. 5320-!-item-!-187;#058&004563
Are at least 10 percent of the people in Country X who are 65 years old or older employed?
(1) In Country X, 11.3 percent of the population is 65 years old or older.
(2) In Country X, of the population 65 years old or older, 20 percent of the men and 10 percent of the women are employed. 这道题目 我选C,为什么 是E.我的做法是 11.3%*(20%+10%) |