如图所示,一根质量为m的金属棒AC用软线悬挂在磁感应强度为B的匀强磁场中,通入A→C方向的电流时,悬线张力不为零,欲使悬线张力为零,可以采用的办法是( )
A:不改变电流和磁场方向,仅适当增大电流
B:只改变电流方向,并仅适当减小电流
C:同时改变磁场和电流方向,仅适当增大磁感应强度
D:只改变磁场方向,并仅适当减小磁感应强度
两只灯泡,A灯“6V 6W”、B灯“6V 3W”,A和B中电流随两端电压变化关系的图象如图甲所示.
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阅读下面文章,完成下面题目廉 颇 思 赵赵师数困于秦。赵王思复得①廉颇②,廉颇亦思复用于赵。赵王使使者视廉颇尚可用否。廉颇之仇郭开多与使者金,令毁③之。廉颇见使者,一饭斗米,肉十斤,被(同“披”)甲上马,以示尚可用。使者还报曰:“廉将军虽老,尚善饭;然与臣坐,顷之三遗矢④矣。”赵王以为老,遂不召。(《史记·廉颇蔺相如列传》)【注释】①复得:再起用。②廉颇:赵国的大将。③毁:诽谤,说坏话。④矢:通“屎”。
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Hello! My 1 is Jim Smith. My first name is 2, and Smith is my 3 name.4am 5 English boy. What's that over there? Oh, it's my 6. It's an 7 dictionary. I like8 very much. 9 is it? It's red. Can you 10 dictionary? Yes, D-I-C-T-I-O-N-A-R-Y.