耙地用拖拉机属于（）。
A、一般用途拖拉机
B、特殊用途拖拉机
C、收割用拖拉机
D、田间耕地拖拉机
参考答案：A
保持正常体态姿势，促使伴随运动顺利进行（）
A.反射
B.随意运动
C.不随意运动
D.反射性运动
E.模式化运动
A．It makes them noisier than they were 20 years ago.
B．It makes it difficult for them to fall asleep.
C．It affects their work during the day.
D．It does harm to their hearing.
