已知方程x2-3x+k=0有两个相等的实数根,则k=______.
∵x2-3x+k=0有两个相等的实数根,
∴△=0,
∴9-4k=0,
∴k=94.
故答案为94.
—— We didn’t find Smith attending the lecture.
—— No one ____ him about _____ a lecture the following day.
A.told ;there to be
B.had told ; there to be
C.told; there was
D.had told ; there being
设备、材料采购评标中,百分评定法的主要好处在于( )。
A.客观公正
B.评标考虑因素全面
C.便于量化比较
D.各投标人独立给分
E.简便易行