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【简答题】
现有两只稳压管,稳压值分别是 6 V 和 8 V ,正向导通电压为 0.7 V 。试问: (1) 若将它们串联相接,则可得到几种稳压值?各为多少? (2) 若将它们并联相接,则又可得到几种稳压值?各为多少?
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反馈参考答案：
举一反三
【简答题】呼吸器官由 和 肺 所组成。通常 鼻 、 、 为上呼吸道, 气管 和 为下呼吸 道, 为气体交换的场所。
【单选题】You can find() for black tea at our end.
A.
a ready market
B.
most popular
C.
great popularity
D.
selling fast
【单选题】You can find ________ become more difficult to see clean rivers in our city.
A.
that has
B.
it has
C.
it
D.
this has
【单选题】—Can you find our city _______ a lot in recent years? —Yes. The road is wider and the buildings are taller.
A.
has changed
B.
changes
C.
changed
D.
will change
【单选题】We can' t find our bikes______Have you seen them?
A.
anywhere
B.
somewhere
C.
nowhere
D.
where
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