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【单选题】
( )环节后的等效传递函数等于各个环节传递函数的代数和。A.
串联
B.
负反馈
C.
并联
D.
正反馈
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】气体交换的场所在 ,它由肺泡上皮和基膜围成。肺泡上皮由 和 细胞共同组成。
【简答题】--“______ he have left yesterday?” --“Yes, he ______ yesterday.” --“No, he ______ yesterday.”A. Must; must have left;
can’t have left B. Can; can have left; can’t have left C. Can; must have left;
can...
【单选题】The police have______that he must have left his apartment yesterday evening.
A.
induced
B.
deduced
C.
reduced
D.
seduced
【简答题】《小树林中的泉水》的体裁是 ,是 的一个分支,是 的一个变体,兼有 两种特性,通常篇幅 ,形式 ,语言灵动。
【单选题】The light in his office is out. He_________ left for home.
A.
must have
B.
must have been
C.
should have
D.
should have been
【简答题】《小树林中的泉水》的体裁是 ,是 的一个分支,是 的一个变体,兼有 两种特性,通常篇幅 ,形式 ,语言灵动。
【单选题】．—Steve come back because the window is open． —Yes．but he _______left it open last night．
A.
must have；might have
B.
might have；can’t have
C.
can have；should have
D.
might；must have
【简答题】肺泡上皮由 细胞和 细胞组成。
【单选题】--- Daniel must have lost his job in that unemployment crisis, __________he? --- I don’t think so．Yesterday I saw him working together with his colleagues.
A.
didn’t
B.
doesn’t
C.
mustn’t
D.
hasn’t
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