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【判断题】
叠加定理除源的原则是电压源断路，电流源开路。A.
正确
B.
错误
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反馈参考答案：
举一反三
【单选题】I know nothing about him he is a famous doctor.
A.
apart from
B.
except for
C.
Besides
D.
except that
【单选题】I know nothing about him he is a famous doctor.
A.
apart from
B.
except for
C.
besides
D.
except that
【单选题】---- Could you tell me something about the boy who helped you just now? ---- Sorry, I know nothing about him, we are _____.
A.
friends
B.
neighbors
C.
classmates
D.
strangers
【单选题】I can use a computer, but ______ it comes to repairing them, I know nothing.
A.
after
B.
until
C.
since
D.
when
【简答题】I can use a computer, ______ (但说到修理), I know nothing.
【简答题】I can use a computer,______(但若谈到修理), I know nothing.
【简答题】微量元素是指（ ）
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