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【单选题】
当变频器为外部端子运行模式时,同时进行STF和STR信号输入,变频器的状态是?A.
变频器处于STR运行状态
B.
变频器处于STF运行状态
C.
变频器处于停止状态
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【单选题】As we deal _____ refrigerators, we are glad to make you the following offer for your consideration.
A.
for
B.
at
C.
with
D.
in
【单选题】We are glad to make you a special offer airmailed _____separate cover,_____ to our finalconfirmation. according
A.
in,
B.
under, subject
C.
with, attention
D.
of, reply
【单选题】As we deal____sewing machines , we are glad to make you the following offer for your consideration .
A.
for
B.
at
C.
with
D.
in
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