单项选择题在输入角度时，如果为负值，则代表（） A、顺时针旋转 B、逆时针旋转 C、向上绘制 D、向下绘制
单项选择题An exchange student or visiting scholar is highly suggested to get medical insurance even though they already have the insurance in the motherland. A、正确 B、错误
