关于胰的描述,下列错误的是()
A.胰头后方可有胆总管
B.只能分泌胰岛素
C.胰管上方常有副胰管
D.胰管与胆总管末端汇合成肝胰壶腹
E.其前、下面有腹膜覆盖
参考答案:B
He is the only one of the students who _____ a winner of scholarship for three years. [ ]
A. is
B. are
C. have been
D. has been