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【单选题】
Cage-type induction motors have a very poor power factor which may be as low as 0.3-0.4 when
A.
starting
B.
running
C.
at high speed
D.
at full load
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参考答案:
举一反三
【简答题】The astronauts and their achievements __________ you mentioned stimulate the youth much so that some of them are engaged in astronautics. [A]which [B] that [C] what [D] whom
【判断题】第一代计算机出现了操作系统
A.
正确
B.
错误
【简答题】A.feed B.irritate C.push D.stimulate
【单选题】The light of this room was _____ dim (昏暗的) for Tom _____ read last night. [     ]
A.
too; to
B.
enough; to
C.
too; not to
D.
so; that
【简答题】5 mol 某理想气体由 27 °C , 10 kPa 恒温可逆压缩到 100 kPa ,则该过程的 D U = , D H = , Q =
【简答题】night dim lamp
【单选题】水痘的传染源是
A.
患者
B.
污染的食物
C.
土壤
D.
病原携带者
E.
受感染的动物
【多选题】S7-200 PLC的中断事件按优先级别从高到低依次是()。
A.
通信中断事件
B.
I/O中断事件
C.
定时中断事件
【简答题】A.feed B.irritate C.push D.stimulate
【简答题】S7-200PLC中断优先级按从高到低的顺序是 、 、
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