供应结肠的动脉是（）和肠系膜下动脉。
参考答案：肠系膜上动脉
The members of the board are discussing the problem right now; it will _____ have been solved by the end
of next week.[ ]
A. luckily
B. immediately
C. hopefully
D. undoubtedly
目前，我国最常见的细菌性痢疾（菌痢）的病原体是（）
A.志贺痢疾杆菌
B.福氏痢疾杆菌
C.鲍氏痢疾杆菌
D.宋氏痢疾杆菌
E.舒氏痢疾杆菌
