小肠腺癌最多见的部位是()
A.十二指肠
B.空肠上段
C.空肠下段
D.回肠上段
E.回肠末端
参考答案:A
Peter and I ________ in the same class. ________ are good friends. [ ]
A. are, Us
B. are, We
C. is, Our
D. am, We
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