超短波治疗时并置法：两电极之间的距离____电极的直径，并且不应小于____。
参考答案：不应大于；3cm
Was it Bill , _____ played basketball well, _____ helped the blind man cross the road? [ ]
A. that; who
B. that; that
C. who; that
D. who; which
3，15，35，63，( )
A．78
B．99
C．81
D．100
