与证券投资相关的所有风险被称为总风险,可分为()。 A.系统风险和非系统风险 B.汇 发布时间:2019-02-15 08:14 │ 来源:www.tikuol.com 题型:单项选择题 问题: 与证券投资相关的所有风险被称为总风险,可分为()。A.系统风险和非系统风险B.汇率风险和利率风险C.自然风险和人为风险D.政策风险和市场风险
题型:单项选择题 New technology _____ to make sure the cars, taxis, buses and trains we use _____ the air.A. is used; not to pollute B. has used; is not pollutedC. is being used; do not polluteD. has been used; not pollute 查看答案