体内一碳单位的载体是
A.叶酸B.二氢叶酸C.四氢叶酸D.维生素B12E.维生素B6
参考答案:C
关于肛裂的非手术治疗与护理,错误的是()
A.调节饮食
B.保持排便通畅
C.便后坐浴
D.局部注射硬化剂
E.局部涂消炎止痛软膏
It was _______ an exciting match _______ I forgot to have supper. [ ]
A. so, that
B. enough, to
C. too, to
D. such, that