贲门的周围血管,不包括().
A.胃冠状静脉
B.胃短静脉
C.胃后静脉
D.奇静脉
E.左膈下静脉
参考答案:D
I have 2 books. One is for you, ____ is for him. [ ]
A. the other
B. the others
C. other
D. another
通信光纤的基本结构是()。
A、纤芯
B、包层
C、护套
D、波纹管