117题 one farmer own a land, clear 90 percent of it, and of the cleared land
40% plant A,50%plant B, and the remaining cleared land plant 270 C
Ask how much land does the farmer own?
(a)….
(c) 7200
(d) 8000
(e) 8990
参考答案:. 8000
JJ127题 is 1000 a factor of k ?
(a) 2000 is a factor of 4k
(b) 8 is a factor of k
参考答案:. C