世纪、年代、年、月、日的记数应使用:() ["汉字","英文","阿拉伯数字"]
液一液萃取时溶剂的选择要注意以下几点?
唐氏综合征患儿染色体核型标准型为() ["46,XX,-14,+t(14q:21q)","47,XX,+21","45,XX,-14,-21,+t(14q:21q)","47,XXX","46,XX,-21,+t(21q:21q)"]
借婚姻索取财物
二尖瓣位于() ["上腔静脉口","下腔静脉口","主动脉口","肺动脉口","左房室口"]
申请Y-POWER卡有哪些基本条件,需提供哪些材料?