若方程：x2-2x+m=0有两个不相等的实数根，则m的取值范围是[ ]
A.m＞1
B.m＜1
C.m≤1
D.m≥1
答案：B
下列各组中的化学式与俗名不一致的是（ ）
A．Ca（OH）2 消石灰
B．Fe2O3 赤铁矿
C．CaCO3 石灰石
D．CaO 熟石灰
What__________you yesterday? I saw you were talking with a boy angrily.[ ]
A. was happened to
B. happened with
C. happened
D. happened to
