低速货车，是指在车辆管理部门登记为（）的机动车。
A.低速货车
B.四轮农用运输车
C.三轮车
D.专用机械车
参考答案：A, B
硅整流发电机的三相电枢绕组，其结构、匝数均相同，且在定子铁芯中的空间位置互错（）的电角度。
She was just about to explain ______ she hadn’t passed her maths test chiefly out of carelessness ______ her uncle came.
A. her motherwhenB. to her mother why thatC. her motherthat whenD. to her mother that when
