村级农业机械化技术员开展（）等工作。
A.技术咨询
B.技术培训
C.联系购买急需配件
D.发放技术资料
参考答案：A, B, C, D
The old lady her husband for forty years.
A．has married to
B．has got married to
C．has married
D．has been married to
证券投资收益包括（）。
A.证券交易的现价
B.证券交易的原价
C.证券交易现价与原价的差
D.定期的股利或利息
