蛇管式加热器
参考答案:
是一种用很长的管子弯曲成的管式加热器
Maybe you think economics is really tough and you regret choosing it,but it's________for me.[ ]
A. helpful
B. plentiful
C. reasonable
D. enjoyable
名义利率为8%,3年期,到期一次还本付息,则有效利率为______。
A.6%
B.6.5%
C.7%
D.7.43%