Every day in China, about 200 million children go to school. Many of them take school buses to school and back home. Most of the time, the school buses are very safe for them. But sometimes they are also dangerous.

    Several years ago, a serious accident happened to a nine – seat minibus in November in Gansu. There were 62 children inside, and 21 of them died.

    What should we do to keep us safe on the road? First, we should wait for the school bus on time at the right place when we are going to school or coming back home. Second, we shouldn't run or fight on the bus when it is going. Third, we mustn't try to get off when it is moving. Last, don't get on the bus if it is overloaded(超载).

    Our government(政府)also makes rules for school buses. Under the new rules, school buses have a speed limit of 80km per(每)hour on highways and 60km per hour on normal roads. While on the road, other cars must let school buses go first.

根据材料内容选择最佳答案。

已知函数$f\left(x\right)=e^x-1,g\left(x\right)=-x^2+4x-3$ 若存在$f\left(a\right)=g\left(b\right)$，则实数b的取值范围为（   ）

综合探究：回望历史，中国曾领先世界，也曾受尽磨难。勤劳勇敢、自强不息，是我们不断奋进的民族精神，当代中国正以更加自信的大国形象屹立于世界。

【古代灿烂辉煌篇】

【近代：自强雪耻篇】

材料二：中国政府5月26日发表《中国的军事战略》白皮书，强调贯彻新形势下积极防御军事战略地，加快推进国防和军队现代化，坚决维护国家主权、安全、发展利益。

——2015年5月27日新华网

【现代：大国崛起篇】

材料三：60年前，亚非29个国家和地区领导人出席了万隆会议，形成了团结、友谊、合作的万隆精神，……亚非国家加强互利合作，能产生“一加一大于二”的积极效应。

——2015年4月22日***在亚非领导人会议上的讲话

材料四：中国把自己的事办好，保持合理的发展，本身就是对世界巨大的贡献。而且中国还在越来越多地承担应尽的国际责任和义务。

——2015年3月15日***答记者问

材料五：

----数据源自钱胜《上海浦东经济发展的20年：成就、经验与未来》

材料六：大国兴衰的过程，实际上也就是其综合国力上升或下降的过程。……民族复兴与和平崛起是当今中国的奋斗目标。

----刘金源《综合国力与大国崛起》