【简答题】对于二次函数y=ax 2 +bx+c,我们把使函数值等于0的实数x叫做这个函数的零点.则二次函数y=x 2 -mx+m-1(m为实数)的零点个数为______.
【单选题】—Excuse me, ? —It’s half past ten.
【单选题】What’s the name of the song which is introduced by the teacher?
A.
The Breaking of the Fellowship
【判断题】In America, if someone asks you, “What’s your first name?” it means “What’s your given name?” True or False?
【判断题】齐次线性方程组的解向量不满足向量的线性运算。