A.have helped solve the problem of such high death rate
B.have oddly accounted for mortality rates in the past century
C.have reduced mortality rates for violent and accidental deaths
D.have achieved no effect in bringing down the number of deaths
第1题
我国的票据包括( )。
A.银行汇票 B.商业汇票
C.支票 D.银行本票
E.商业本票 F.期票
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