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【单选题】
三相桥式整流电路带大电感负载时,控制角α的有效移相范围是 度。A.
0 °-90°
B.
30 °-120°
C.
60 °-150°
D.
90 °-150°
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反馈参考答案：
举一反三
【简答题】阅读理解。 For some reason, Mr Robinson worked in South Africa(非洲). His son was born there. His name was John. One winter Mr and Mrs Robinson went to England, and they took John there.John was seven years ...
【简答题】如何正确的安装与对刀
【单选题】For some reason, his name did _____ mind.
A.
stick in
B.
stick out
C.
put in
D.
put out
【单选题】He was hoping they would take his suggestion, but for some reason they______.
A.
turned it over
B.
turned it off
C.
turned it down
D.
turned it up
【简答题】依据《海船法定建造检验技术规程》，如何检查主罗经与方位分罗经的安装正确性？
【多选题】如何正确使用安全气囊:
A.
安全气囊一定要与安全带配合使用。
B.
儿童不可坐在装有安全气囊的副驾驶位置。
C.
注意观察安全气囊警告灯
D.
气囊安装处不要粘贴其他东西
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