单项选择题FR-D700变频器参数Pr.25 的主要功能是（ ）。 A、4段速度设定 B、5段速度设定 C、6段速度设定 D、7段速度设定
单项选择题Photography became his _________ after his mother gave him his first camera when he was 12. A、section B、option C、passion D、emotion
