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【单选题】
在同相比例运算电路中，的反相端 _____ 。A.
接地
B.
虚地
C.
与地无关
D.
断开
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举一反三
【单选题】We return herewith one copy ____________ signed to you for our file.
A.
with
B.
being
C.
duly
D.
due
【单选题】These issures were discussed at length during the meeting. The underlined part means__________.
A.
eventually
B.
subsequently
C.
lastly
D.
fully
【单选题】We herewith two copies of our illustrated catalogue for your consideration.
A.
include
B.
enclose
C.
inquire
D.
exclude
【单选题】We _________ herewith two copies of our illustrated catalogue for your information.
A.
include
B.
inquire
C.
demand
D.
enclose
【单选题】We have the pleasure of sending you herewith our samples and literature______.
A.
relative
B.
covering
C.
concerned
D.
concerning
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