属于计划免疫的是
①给刚出生的婴儿接种卡介苗②幼儿服用脊髓灰质炎糖丸③糖尿病人注射胰岛素④缺碘地区的孕妇服用碘片[ ]
A.①②
B.①③
C.②③
D.①④
答案:A
下列药物中治头痛的要药是()
A.川楝子
B.川芎
C.川贝母
D.川乌
E.川牛膝
The students at this school always take active part in volunteer work during summer vacation. [ ]
A. a
B. an
C. the
D. /