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【单选题】
单相半波可控整流电路R负载，控制角a的最大移项范围是（）。A.
180°
B.
120°
C.
150°
D.
90°
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举一反三
【简答题】What are the immediate actions that we should take?
【简答题】原始凭证应由（ ）审核。
【单选题】When having a fire alarm during normal working hours, what immediate actions should be taken?
A.
Act according to instruction given in the fire plan
B.
Start the fire pump, the sooner the better
C.
Start searching for the fire to determine if it is in the engine room
D.
Everybody gathers in the safety center
【简答题】MPV车型的全称是 。
【简答题】What steps and actions should a research supplier take to try to become a strategic partner with a research ?
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