叙述小儿推拿揉小天心穴的操作手法。
参考答案：
小天心穴位于大小鱼际交接处凹陷中。手法：以中指端揉小天心穴。
Instead of importing Chinese labor，the United States is importing goods that are produced with Chinese labor，which is a typical example of importing goods from another country instead of importing factors of production．( )
波绕组主要用于（）的直流电机中。
A.高电压，小电流
B.高电压，大电流
C.低电压，小电流
D.低电压
