保险公司用保险资金狗毛的企业债券，体现的是保险的哪项功能（）
A、保障功能
B、资金融通功能
C、社会管理功能
D、投资收益功能
参考答案：B
因式分解：x2﹣5x﹣6．
You were on the farm yesterday, ____ you? [ ]
A. didn't
B. don't
C. aren't
D. weren't
