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【简答题】
描述某系统的微分方程为 y”(t) + 5y’(t) + 6y(t) = f(t) ; 求 ( 1 ) 当 , t ≥0 ; y(0)=2 , y’(0)= – 1 时的; ( 2 )当 , t ≥0 ; y(0)= 1 , y’(0)=0 时的。
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反馈参考答案：
举一反三
【单选题】－－－ It took me ten years to build up my busine
A.
28. --- It took me ten years to build up my business,and it almost killed me. --- Well, you know what they say. _________. （江苏） A. There is no smoke without fire
B.
Practice makesperfect
C.
All roads lead to Rome
D.
No pains, no gains
【单选题】Speaker A: It took me ten years to build up my business, and it almost killed me. Speaker B: Well, you know what they say:______
A.
There is no smoke without fire.
B.
Practice makes perfect.
C.
All roads lead to Rome.
D.
No pains, no gains.
【简答题】胺碘酮最严重的不良反应是 。
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