引起新生儿十二指肠梗阻的常见疾病有（）
A.十二指肠闭锁和狭窄
B.环状胰腺
C.肥厚性幽门狭窄
D.肠旋转不良
E.胃扭转
参考答案：A, B, D
有的花能散发出香气，其作用是 [ ]
A．招引动物来采摘
B．招引昆虫来传粉
C．美化自己
D．招引昆虫来采蜜
The UN should _____ the establishment of Iraqi government after the war, I think.
A．take part in
B．play a leading role in
C．play a role among
D．play a important part for
