债券发行时，若市场利率低于债券利率，则债券的发行价格往往低于债券的票面价值。( )
参考答案：错
对于需降温患者实施灌肠技术时，灌肠液最好保留（）
A.10min
B.20min
C.30min
D.40min
一I can't go to school today. I have a headache.
一_________[ ]
A. That's OK.
B. It doesn't matter.
C. I hope not.
D. I'm sorry to hear that.
