利息备付率表示项目的利润偿付利息的保证倍数，对于正常运营的企业，利息备付率应大于 ( )。
A．2.0
B．1.5
C．1.0
D．0.5
参考答案：A
—Why is Harvey's mother so happy?
—Because only three students _____, _____ his son Harvey.[ ]
A. failed the exam;besides
B. made progress;except
C. made progress;including
D. passed the exam;without
常用的渗透压调节剂是（）
A.维生素C
B.卵磷脂
C.枸橼酸
D.盐酸普鲁卡因
E.氯化钠
