用in demand ,on demand 各造一句句子,
问题描述：
用in demand ,on demand 各造一句句子,
答
in demand:非常需要的;受欢迎的.例:You seem to be in great demand today.你如今似乎很受欢迎.on demand:一经要求,例:The workers’demand for a 10% pay rise machines which dispense cash on demand.工人要求提...