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【简答题】
按异步电动机转差率的大小和正负符号的不同,异步电动机可分为三种方式,即电动机状态、____和电磁制动状态。
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举一反三
【单选题】Most of what we know about the beginning of languages we learn ______ .
A.
from religious or folk stories
B.
from the Greek historian Herodotus
C.
by reference to their origin
D.
by studying the Phrygian
【单选题】We’ll reach the sales targets in a month _______ we set at the beginning of the year.
A.
which
B.
where
C.
when
D.
what
【单选题】From the Paragraph 1, we can see that beginning in the 1970s______.
A.
income became more unequal
B.
income became more equal
C.
income became more unstable
D.
income became more stable
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