若x2+x=1,则代数式2x2+2x-8的值为[ ] A.6 B.-6 C.8 发布时间:2017-05-19 16:03 │ 来源:www.tikuol.com 题型:选择题 问题: 若x2+x=1,则代数式2x2+2x-8的值为[ ]A.6B.-6C.8D.-8
题型:选择题 Which abnormal laboratory value is most indicative of aplastic anemia()A. A decreased hemoglobin.B. An elevated white blood cell count.C. An elevated red blood cell count.D. A decreased erythrocyte sedimentation rate. 查看答案