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【简答题】
A．Because he has made enough money to make a good living. B．Because he likes teaching business in a local college. C．Because he cannot get support from his family. D．Because he feels much stressed.
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反馈参考答案：
举一反三
【单选题】一LTI连续系统,已知当激励信号为f(t)时,系统的零状态响应为y (t)= e -t ε(t),当激励信号为2 f (t) + f (t-1) 时,系统的零状态响应为
A.
2e -t ε(t)
B.
e -(t-1) ε(t-1)
C.
2e -t ε(t)+e -(t-1) ε(t-1)
D.
3e -t ε(t)
【单选题】I have hardly found myself bound when I ______ .
A.
wake up
B.
take to
C.
pick up
D.
come to
【简答题】风萧萧,雨萧萧,马萧萧。
【单选题】Here are some tips _______what to wear ______ your first day at your internship.
A.
of, in
B.
on, in
C.
with, at
D.
on, on
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