食品生产经营单位负责人的初次培训时间应不少于多少学时
A．15B．20C．25D．30E．50
参考答案：B
They _______ in Nanjing since they came to China two years ago.
A．lived
B．have lived
C．live
D．are living
带有铃铛的贱金属制狗颈圈
