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【单选题】
用( )端口控制变频器高速输出?A.
Y14
B.
Y15
C.
Y16
D.
Y17
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反馈参考答案：
举一反三
【单选题】(2013·陕西西安三校二检)Despite the government's measures to cool the house market, housing demand in China still grew steadily in the second half of 2012，________ a rapid rise in house prices.
A.
resulted in
B.
to result in
C.
resulting in
D.
being resulted in
【单选题】Our government has been praised ______ the extraordinary measures it has taken to contain the outbreak, despite the severe social and economic impact those measures are having ______ us.
A.
against … to
B.
into … with
C.
for … on
D.
toward …. upon
【简答题】同步电动机（）可以分为他控式变频调速系统和自控式变频调速系统。
【简答题】三相异步电动机交流调速系统调可分为交流调压调速系统和变频调速系统,其中变频调速系统在基速以下采取( )调速策略,基速以上采取( )调速策略。
【单选题】Our government has been praised for the extraordinary measures it has taken to contain the outbreak,despite the severe social and economic (impact) those measures are having on us.
A.
affect
B.
effect
C.
influence
D.
none
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