过抛物线y2=4x的焦点引一直线,已知直线被抛物线截得的弦被焦点分成2:1,求这 发布时间:2017-04-19 16:57 │ 来源:www.tikuol.com 题型:解答题 问题: 过抛物线y2=4x的焦点引一直线,已知直线被抛物线截得的弦被焦点分成2:1,求这条直线的方程.
题型:解答题 A. Experts in the medical field have doubled in the past five years. B. Both health food and medical authorities have recommended Vitamin E. C. The health food experts are not authorized to comment on Vitamin E. D. The selling of Vitamin E must be approved by the leading medical authorities. 查看答案