His mother ________once a week. [ ]
A. shops
B. shop
C. go shopping
D. shopping.
答案:A
乙肝疫苗初次免疫的年龄是
A.生后1~2天 B.1个月以上 C.2个月以上 D.肌内注射 E.皮下注射
恙虫病焦痂或溃疡的特点不包括()
A.直径多为4~10mm
B.圆形或椭圆形,多为单个
C.边缘突起,呈围堤状
D.伴有化脓
E.多见于腋窝、外生殖器、腹股沟和会阴处