对尿素通透性最高的部位是
A.髓袢升支细段
B.髓袢升支粗段
C.集合管皮质部
D.集合管髓质部
参考答案:D
解析:对尿素通透性最高的部位是集合管髓质部。
简述注册税务师对房产税代理纳税审查操作要点。
Helen always helps her mother even though going to work ____ most of her day.
[ ]
A. takes up
B. makes up
C. saves up
D. puts up