7＋（ ）＝14。
A：5
B：6
C：7
D：8
经典诵读可以帮助我们提取丰富的历史信息。《三字经》“嬴秦氏，始兼并……迨至隋，一土宇……元灭金，绝宋世。太祖兴，国大明”中所反映的从长期分裂走向统一的朝代有( )
A student in Fudan University was killed by his roommate just because of small things in daily life. It is important for students to learn how to _________ each other.
很快，但很快走下坡路，从根本上是由于