()指的是两腿前后开立,后腿支撑,膝微屈,脚尖外展约60度;前腿自然伸直,脚尖外展约45度,前脚掌着地。
参考答案:弓步
AT供电防干扰的原理是什么?
---- _____ do you play football?
---- Once a week.
A.How long
B.How soon
C.How often
D.How