什么表明机外氧气释放（）？
A.顶板21VU的警告
B.氧气瓶上的直读式压力表
C.一个黄色指示片（吹掉）
参考答案：C
In recently years, financial innovation and growth in real GDP increase the demand for money. Is this statement correct, respectively Financial innovationGrowth in real GDP（）①A. NoNo ②B. NoYes ③C. YesNo
A．①
B．②
C．③
可通过哪些渠道开通或取消话费周报业务？
