属喹诺酮类的药物是
A．阿普唑仑B．环丙沙星C．妥布霉素D．利巴韦林E．阿奇霉素
参考答案：B
Don't go out to play. You _____ finish your homework first. [ ]
A. must
B. have
C. had
D. had to
A公司拟等价发行面值1000元，期限5年、票面利率为8%的债券4000张，每年结息一次，发行费用为发行价格的5%，公司所得税率33%，这笔债券的资本成本是( )。
A．3.45%B．4.32%C．5.64%D．6.05%
