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【简答题】
当输入f(k)=ε(k)时，某LTI离散系统的零状态响应为 y zs (k)=[2-(0.5) k +(-1.5) k ]ε(k) 求其系统函数和描述该系统的差分方程。
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【单选题】—Ted, Could you please________the trash? —Of course, Mom.
A.
take after
B.
take off
C.
take out
D.
take care of
【单选题】– Could you please _____ the trash? – OK, I’ll do that.
A.
take on
B.
take out
C.
take off
【单选题】It's full of trash. Could you _______? [ ]
A.
take out them
B.
take them out
C.
take out it
D.
take it out
【单选题】— What is the matter with you? Can I do you a favor? — Thank you, I _____ if you could take me to the station. [ ]
A.
would wonder
B.
will wonder
C.
was wondering
D.
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【单选题】Could you please ____ me ____ out the trash? [ ]
A.
to help, to take
B.
help, take
C.
to help, take
D.
help, taking
【简答题】Could you please take out the trash?(作肯定回答) ______,______ ______.
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