当项目的全部投资收益率大于贷款利率时，增加负债，自有资金的收益率（）
A.不变
B.增加
C.减少
D.不确定
参考答案：B
I _____ of your trying to earn some money by taking part time jobs, but please don’t neglect your studies at university.
A．assess
B．acquire
C．appreciate
D．approve
麻疹减毒活疫苗的初种年龄是（）
A.6个月
B.8个月
C.2个月
D.1岁
E.3个月
