单项选择题

The relationship between copper loss of a transformer is( ).
A、proportional to load current squared
B、proportional to load current
C、inversely proportional to current
D、independent of load

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单项选择题

Some of them can be checked automatically at first, but _________, we’ll still need to process each one manually.
A、in any case
B、in case
C、in case of
D、at case

单项选择题

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