简述货币的基本职能。
参考答案：
①价值尺度功能、②流通手段功能、③贮藏手段、④支付手段、⑤世界货币
You _____ the flowers more water so that they can grow well now.
A．would have given
B．might have given
C．must have given
D．should have given
绳缠绕式提升机的工作原理是怎样的？
