My uncle ______ a new computer. [ ]
A. have
B. has
C. is
D. are
答案：B
用( )方式付息的债券通常被称为无息债券。
A．单利B．贴现C．复利D．分期
A．mgtgθ
B．mgsinθ
C．μmg
D．μmg
mgtgθ
mgsinθ