间接ELISA的标记物为()
A.酶标抗原
B.酶标第一抗体
C.酶标第二抗体
D.酶标亲和素
E.酶标生物素
参考答案:C
某男,56岁。因惊恐复受寒后致腰部疼痛,转摇不能,行则偻附,伴精神萎靡,畏寒肢冷,苔薄白,脉沉迟。结合《素问·至真要大论》病机十九条分析。
治疗应首选()
A.四妙散
B.桂枝芍药知母汤
C.右归丸
D.甘姜苓术汤
E.六味地黄丸
When I was young, I was told that I _____ play with matches.[ ]
A. wouldn't
B. needn't
C. mustn't
D. daren't