【单选题】下列一元二次方程中,二次项系数、一次项系数和常数项分别是1,-1,0的是( )
【单选题】听力原文:M: I'll go and get you another cup of coffee. W: Another cup? I haven't even touched the first one. What does the woman mean?
A.
She hasn't yet drunk any coffee.
B.
She wants another cup of coffee.
C.
She likes coffee very much.
【单选题】方程■ 是二元一次方程,■是被弄污的x的系数,请你推断■的值属于下列情况中的( )
【单选题】下面的一元二次方程中,一次项系数为5的方程是( )
【单选题】There ___ some tea in the cup. [ ]
【单选题】一元二次方程x 2 -3x-5=0中的一次项系数和常数项分别是( )
【单选题】Please give ____________ a cup of water. ____________ cup isn't here. [ ]
【判断题】医疗器械是 由药物或代谢或免疫在起主要作用。( )
【单选题】关于x的一元二次方程x 2 -x=8(x-1)+5中,二次项系数、一次项系数、常数项分别是( )