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【单选题】
设硅稳压管D Z1 和D Z2 的稳定电压分别为5V和8V,正向压降均为0.7V,可求出图1.21(a) 中电路的输出电压V o 为_______;可求出图1.21(b)中电路的输出电压V o 为_______;可求出图1.21(c)中输出电压V o 为_______;可求出图1.21(d)中输出电压V o 为_______。A.
13V;1.4V;5V;0.7V
B.
13V;11.6;8V;0.7V
C.
13V;7V;8V;0.7V
D.
13V;17V;5V;0.7V
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举一反三
【单选题】判断O型血型,其反应格局依据是
A.
红细胞无抗原，血清有抗-A,B
B.
红细胞无抗体，血清无抗体
C.
红细胞有AB抗原，血清无抗体
D.
红细胞有A抗原，血清有抗-B
E.
红细胞有B抗原，血清有抗-A
【简答题】请结合本专业,说明工业废渣如何进行循环利用?
【单选题】听力原文：Why are you working late? (A) You never work at night. (B) Because my work is finished. (C) I have to finish this report. (30)
A.
B.
【简答题】习题册11页题
【单选题】-Why are you working so hard?
A.
need to get my debt cleaned up____.
B.
as quickly as possible
C.
as soon as possible
D.
as quickly as I can
E.
as soon as
【单选题】Why are you working so hard? I need to get my debt cleaned up .
A.
as quickly as possible
B.
as soon as possible
C.
as quickly as I can
D.
as soon as
【简答题】习题册 1.1题
【判断题】庄子在《任公子钓鱼》这篇寓言中告诉我们：有远志的人必须有所舍才能有所大成，要想成就一番大事业，就得胸怀大志，朝着既定的目标一直走下去，持之以恒，狠下工夫，才会到达胜利的彼岸。( )
A.
正确
B.
错误
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