Oddis括约肌主要阐述正确的为()。
A.调控胆汁分泌
B.调控胰液分泌
C.防止十二指肠液反流
D.围绕胆总管十二指肠壁内段和壶腹外层
E.上述都是
参考答案:E
It can’t be denied that the Diaoyu Islands are _______ part of China and what some Japanese have done recently is actually _______ offence against Chinese people.
A.a; /
B.a; the
C.the; /
D./; an
DNA的三级结构是
A.核小体串珠结构B.双螺旋模型C.Z-DNA锯齿结构D.染色体结构