Not only       his lesson, but also he often help others with their lessons.[      ]

A. did he do well in              

B. he do well in            

C. does he do well in            

D. he did well in

有关血清胆汁酸测定的临床意义，不正确的是（）

A.可灵敏地反映肝脏的清除能力

B.各种肝胆疾病患者，血中总胆汁酸浓度升高

C.血清CA/CDCA比值可以为胆道阻塞性病变与肝实质细胞性病变的鉴别指标

D.在回肠切除，炎症等小肠疾病时，血清胆汁酸水平降低

E.血清胆汁酸水平测定，用于高脂血症的分型