与宫颈癌发病有关的病原是（）。
A.EBV
B.HTLV–1
C.HPV
D.HCV
E.HIV
参考答案：C
The doctor and writer _________ in Harbin last year.[ ]
A. is
B. are
C. was
D. were
碱度最高的是（）
A、天然富矿
B、球团矿
C、烧结矿
D、尾矿
