胆总管依行程可分为几段()
A.二段
B.三段
C.四段
D.五段
E.六段
参考答案:C
解析:胆总管分四段:十二指肠上段、十二指肠后段、胰腺段与十二指肠壁段。
实际超产20%,这句话把______看作单位“1”.
Are there any similarities and differences between the Oral Approach and the Audiolingual Method in terms of language theories and learning theories