下列对“喜怒不形于色”的认识正确的是（  ）

粮食仓库运来15车大米，每车装大米3.5吨，又运来15车面粉，每车装4.5吨，运来的大米和面粉一共是（ ____   ）吨。

2015年10月16日财政部发布公告称，根据国家国债发行的有关规定,财政部决定发行2015年记账式附息(二十四期)国债。本期国债计划发行220亿元,实际发行面值金额220亿元。这一政策发挥影响的路径是（  ）

①增加财政收入　②增加国内需求　③扩大政府投资　④刺激经济发展

如图可用来表示哪一组概念之间的关系（　　）

    Now a hot topic____(discuss) about whether the old computers in our school should be replaced____new ones. With the rapid____ ( develop) of science and technology, there is no doubt ____our old computers are totally out of date. The headmaster as well as the teachers and students____(be) not satisfied with the slow working speed of the computers. Therefore, all of them request to have a new computer so that their problems can be solved ____ （success).____the school should consider is ____to deal with the old computers wisely. Personally speaking,____(throw)  them away to the place____they are regarded as rubbish is not a good idea.