题干
Other girls in the office ____________ Mary’s looks, so they were not very nice to her.
A：took pride i
B：were jealous of
C：were fond of
D：were pleased with
答案(点此获取答案解析）
B
为一等差数列，
为一等比数列，且这6个数都为实数，
与
可能同时成立；②
与
可能同时成立；
，则
；④若
，则
．