电针治疗扭挫伤首选的波型是（）。
A.疏波
B.密波
C.疏密波
D.断续波
E.钜齿波
参考答案：C
—Mr. Harry, we want to hear what you think about the reform being carried out in our school.
—OK, I _____ to that.
A．am coming
B．have come
C．came
D．come
止咳平喘，润肠通便
A．桑白皮B．苏子C．葶苈子D．紫菀E．白果
