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【单选题】
常用的电流互感器副边标准额定电流为 多少? 当 N 2 / N 1 =1000 / 10 时,电流互感器可测量的最大电流为 ? 。A.
5A ／ 500A
B.
10A ／ 1000A
C.
5A ／ 50A
D.
10A ／ 100A
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反馈参考答案：
举一反三
【简答题】蛋白质合成后必须分选出来,定向输送到最终发挥生物功能的细胞靶部位,这一过程称为________。
【单选题】Its already dark now. Dont you think its about time______?
A.
we are having dinner
B.
we have dinner
C.
we had dinner
D.
we can have dinner
【简答题】When we think of Mir in terms of its achievements，its setbacks are_________．
【单选题】When we ___ a foreign language, we’d respect its ____, or we can’t really learn it well.
A.
speak; idioms
B.
study; ways
C.
learn; customs
D.
master; manners
【单选题】Li Pin and I are in the same school. He is a Young Pioneer. We're good friends. Li Pin is in Class 4, and I am in Class 5. This is Li Pin's room. It's not big, but new. There is a black desk in the ro...
A.
in the same school
B.
girls
C.
boys
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