* * 结节可见于()
A．绒毛膜上皮癌
B．良性葡萄胎
C．恶性葡萄胎
D．正常妊娠
E．宫颈癌
参考答案：A, C, E
--My father ___________ a letter yesterday, but I’m not sure if he has finished it.
---Why not ask him about it ?
A．wrote
B．was writing
C．has written
D．writes
防止调车事故的根本措施是（）。
A、遵章守纪
B、不必进行复诵
C、复诵或不复诵均可
