小儿推拿常用于急症,有以指代针之称的手法是()
A.按法
B.拿法
C.揉法
D.掐法
参考答案:D
He knows China very well. That is, he has _____ good understanding of _____ Chinese history. [ ]
A. /; the
B. /; /
C. a; a
D. a; /
简述YJ29滤嘴接装机胶辊的拆卸、清洁保养方法和步骤。