如果我国从俄罗斯大量进口原油，最佳的运输方式是[ ]
A、管道运输
B、公路运输
C、水路运输
D、铁路运输
答案：A
After staying in hospital for long, the patient was advised to go to the seaside to _____ his health.
A．take up
B．pick up
C．carry up
D．make up
假说
