通货紧缩
参考答案:
由于货币供给不足而引起货币升值,物价普遍、持续下跌的货币现象。
Grace often helps her mother______ some housework. [ ]
A. did
B. do
C. does
D. doing
IPTV业务的商务类业务有哪些?()
A.电视导航
B.电视商城
C.本地资讯
D.电视支付
E.电视理财