某国去年商品价格总额为20万亿元，流通中所需要的货币量为4万亿元。假如货币流通速度不变，今年商品价格总额30万亿元，不考虑其他因素，理论上今年流通中所需的货币量为（ ）
A：5万亿元
B：6万亿元
C：7．5万亿元
D：10万亿元
2015年是二战结束70周年，回顾20世纪上半期，对全世界来说是多灾多难的。下列属于两次世界大战共同点的是（ ）
①都是非正义的战争 ②都造成了重大人员伤亡和财产损失③中国都参战，且都是战胜国 ④工业文明的科技成果都被用于战争’
给下列加下划线的词语换个说法，意思不变。
①我们要积极的面对生活，不能稍有不顺就自甘堕落。____
②生活的真谛在于寻求不断进步的欲望。____
③无论做什么事，我们都要慎重考虑。____
It was Sunday yesterday. The weather was fine. It was sunny and there were no clouds in the sky. Sandy and Sue got up early in the morning. Now they were in the park. It is a big park and it's so beautiful. They saw many people there. Some boys played football on the grass. Some girls danced under the tree. An old man walked beside the lake. A young woman and her little son looked at the fish in the lake. How happy they are!
