题型:单项选择题 This coastal area ______ a national wildlife reserve last year.A. was named B. named C. is named D. names 查看答案
题型:单项选择题 上海证券交易所、深圳证券交易所和中国金融期货交易所拟在保留现有个股涨跌幅制度前提下,引入()。9月7日,三大交易所发布交易规则并征求意见。A.交易保护机制B.指数做空机制C.股指期货机制D.指数熔断机制 查看答案