What does she have _______ dinner at school? [ ]
A. to
B. like
C. at
D. for
答案:D
实验室中,检测生物组织中是否含有还原糖常用的试剂是[ ]
A.双缩脲试剂
B.本尼迪特试剂
C.苏丹Ⅲ染液
D.碘一碘化钾溶液
尿的浓缩过程主要发生在
A.近曲小管B.远曲小管和集合管C.集合管D.近曲小管和远曲小管E.髓袢