下列最容易引起喉痉挛的药物是（）。
A.异丙酚
B.依托咪酯
C.咪达唑仑
D.硫喷妥钠
E.地西泮
参考答案：D
She is upset today, and I want to do I can to cheer her up.
A．whichever
B．however
C．whatever
D．whenever
债券掉换方法包括______。
A．替代掉换
B．市场内部价差掉换
C．利率预期掉换
D．纯收益率调换
