应首选何器官作为代食管器官
A.残胃
B.空肠
C.回肠
D.带血管蒂空肠段
E.结肠
参考答案:E
Thinking that the students were having an evening class, the teacher left the classroom, _____.
A.slowly and gentle
B.slowly and gently
C.slow and gentle
D.slow and gently
可行性研究阶段的勘探点布置时,各比较坝址应布置()条勘探剖面。
A.1~3
B.3~5
C.5~7
D.7~9