问题
选择题
| She often _____ walks after supper with her son. |
A. is taking B. take C. takes |
答案
答案：C
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| She often _____ walks after supper with her son. |
A. is taking B. take C. takes |
答案：C
。从线圈平面与磁场方向平行时开始计时，线圈转过60°时的感应电流为1A。那么
=
sin