表征货币
参考答案：
是指由足值货币的代表物，包括银行券、辅币等执行货币基本职能的货币形态。
—How does Jack usually go to school?
--He_____a bike, but now he_____there to keep healthy.
A．used to riding, is used to walk
B．was used to riding, is used to walking
C．used to ride, is used to walking
D．used to ride, is used to walk
职业健康检查结果的处理有哪些？
