西晋灭亡后,北方陷入严重的战乱。4世纪后期,_________族建立了前秦 * * 。前秦王_________重用________为相。迅速强大,统一了黄河流域。
氐;苻坚;王猛
直接融资是指政府、企业等货币资金需求者直接通过发行债券、股票等形式,从机构、个人等货币资金投资者手中融人所需资金。( )
His sister left home in 1998,and ________ since.[ ]
A.had not been heard of
B.has not been heard of
C.had not heard of
D.has not heard of