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【简答题】
Y —△形降压启动是指电动机启动时,把定子绕组接成 ,以降低启动电压,限制启动电流,待电动机启动后,再把定子绕组改接成 ,使电动机全压运行。这种启动方法适用于在正常运行时定子绕组作 连接的电动机。
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举一反三
【单选题】We suggest that this material _____ packed _____ tins of 625 grams, 48 ______ tins one wooden case.
A.
is; with; in
B.
is; in; in
C.
be; with; in
D.
be; in; to
【简答题】We suggest that this applicant (apply) next year.
【简答题】中国古代管理思想主要体现在哪些领域?
【单选题】We suggest that this material _______ packed _______ tins of 450 grams each, 24 tins ______ one carton.
A.
is, with, in
B.
is, in, in
C.
be, with, in
D.
be, in, to
【多选题】在微生物检验室,对培养箱的配置和使用正确的是( )
A.
最少配置:30(℃)、37(℃)培养箱各一个
B.
最少配置:20(℃)、37(℃)培养箱各一个
C.
培养物能放在最底层,也不得放置过于拥挤及碰内壁
D.
每1个月消毒一次
【多选题】古人占卜用的两种基本工具是什么?
A.
竹签
B.
龟甲
C.
铜钱
D.
蓍草
【单选题】We suggest that this material____ packed____ tins of 625 grams.48 tins ____ one wooden case.
A.
is,with,in
B.
is,in,in
C.
be,with,in
D.
be,in,to
【单选题】We suggest that this material _ packing _ tins of 450 grams each, 24 tins to one carton.
A.
is , with, in
B.
is, in, in
C.
be, with, in
D.
be, in, to
【简答题】单选题 We suggest that this applicant _____next year.A. apply B. applys
【单选题】We suggest that this material ________ packed __________ tins of 600 grams, 20 tins _________ one wooden case.
A.
be, in, to
B.
is, in, in
C.
in, with, in
D.
be, with, in
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