【简答题】According to a marketing executive, many students from low-income families don‘t know they could have a chance of going to an elite university. 查看材料
【单选题】What does Mr. Leonard expect from those low-testing students?
C.
Respectfulness and discipline.
D.
Willingness to learn by themselves.
【简答题】他什么时候有空呢 ? What time is c_______ for him ?
【单选题】已知x(n)=δ(n),其N点的DFT[x(n)]=X(k),则X(N-1)=()
【单选题】已知x(n)=δ(n),其N点的DFT[x(n)]=X(k),则X(N-1)= ()