【单选题】各项不为零的等差数列{a n }中,2a 4 -a 7 2 +2a 10 =0,则a 7 的值为 [ ]
【简答题】设{a n }是等差数列,a n >0,公差d≠0,求证: a n+1 + a n+4 < a n+2 + a n+3 .
【简答题】市场法中的房地产状况调整可以分为区位状况调整、实物状况调整和权益状况调整。( )
【简答题】His brother shook his head, but gave no ______(explain).
【简答题】等差数列 中,a 2 =0,a 4 =2,,则该数列的前9项和 = ▲ .
【简答题】Last year mike earned ______ his brother, though his brother has a higher position. A) twice as much as B) twice as many as C) twice than D) twice as more as
【简答题】市场法中的房地产状况调整可以分为区位状况调整、交易情况调整和权益状况调整。 ( )
【判断题】市场法中房地产状况调整可以分为区位状况调整、交易情况调整和权益状况调整。( )