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【简答题】
一般用______指标衡量计算机存储能力。
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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
【判断题】在实际运用中,变频调速只需改变电动机定子电压的频率就可以调节转速大小了。
A.
正确
B.
错误
【单选题】舱底水管系和压载水管系中所设的阀门分别为_________ 。
A.
截止阀,截止阀
B.
截止阀,截止止回阀
C.
截止止回阀,截止止回阀
D.
截止止回阀,截止阀
【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
【单选题】您的思维是习惯性看到细节还是大局(整体)呢?
A.
习惯性关注细节
B.
习惯性关注大局(整体)
C.
其他
【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。
【多选题】1~89.根据变频器的不同,变频调速可以分为( )变频调速。
A.
交—直
B.
交—直—交
C.
直—直
D.
交—交
【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
【单选题】您的思维是习惯性看到细节还是大局(整体)呢?
A.
习惯性关注细节
B.
习惯性关注大局(整体)
C.
其他
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