单项选择题
问答题
在一绝热箱中装有水，水中通一电阻丝，由蓄电池供电，通电后水及电阻丝的温度略有升高。以水为系统，Q ...
问答题在一绝热箱中装有水，水中通一电阻丝，由蓄电池供电，通电后水及电阻丝的温度略有升高。以水为系统，Q 0，W 0，ΔU 0。（大于，小于或等于）
In line with the development of the global digital econ...
问答题In line with the development of the global digital economy, money has evolved towards the direction of ( [填空1]) currency after experiencing various forms.
