牙源性囊肿的衬里上皮来源不含（）
A.成釉器
B.缩余釉上皮
C.Serres上皮剩余
D.Malassez上皮剩余
E.呼吸道上皮
参考答案：E
A. The apartment isn’t within _____ of the subway station as its advertiser has claimed
it is.
A.a stone’s throw B. the throw of a stone
C. stone’s throw D. a stone throw
中国海分为（）
A、北海
B、南海
C、东海
D、黄海
E、渤海
