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【单选题】
求图中电流的大小和方向( )A.
2A ，逆时针
B.
2A ，顺时针
C.
1A ，顺时针
D.
1A ，逆时针
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反馈参考答案：
举一反三
【判断题】数控设备是一种高效能自动化加工设备。与普通设备相比,数控设备具有如下特点:适应性强;精度高,质量稳定;生产率高;能完成复杂型面的加工;减轻劳动强度,改善劳动条件;有利于生产管理。( )
A.
正确
B.
错误
【简答题】在Excel2010工作表中，单元格区域D2:E4所包含的单元格个数是___个。
【简答题】Fill in the blanks with appropriate prepositions or adverbs. 1. It was the worst drought that had ever hit the region. Even the water that was trickling _______ the river would dry________ if the drou...
【单选题】Scientists only knew that it was collocated on certain principles.
A.
drew
B.
arranged
C.
resolved
D.
calculated
【判断题】In former times, marriage among wealthy families were arranged by the girl’s parents, that is, it was the parents’ duty to find a suitable husband for their daughter.
A.
正确
B.
错误
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