外周血中出现有核红细胞可见于以下疾病,但除外:()
A.伴髓外造血的骨髓纤维化
B.恶性肿瘤骨髓转移
C.β珠蛋白生成障碍性贫血
D.镰状细胞贫血
E.缺铁性贫血
参考答案:E
You must follow the directions exactly, and if you should become you must take the time to back again and read them over.
A.confused
B.to be confused
C.to confuse
D.confusing
已知关于x的一元二次方程x2+(m-1)x-2m2+m=0(m为实数)有两个实数根x1、x2.
(1)当m为何值时,x1≠x2;
(2)若x12+x22=2,求m的值.