sin37°-μcos37° |
cos37°+μsin37° |
0.6-0.5×0.8 |
0.8+0.5×0.6 |
200 |
11 |
sin37°+μcos37° |
cos37°-μsin37° |
0.6+0.5×0.8 |
0.8-0.5×0.6 |
100 |
0.5 |
A.点电荷C应放在AB直线上B的右侧 |
B.点电荷C应放在AB直线上A的左侧 |
C.点电荷C是正电荷 |
D.点电荷C是负电荷 |
A.35N | B.25N | C.15N | D.5N |
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