“治国必治边、治边先稳藏。”近年来，西藏自治区党委和政府贯彻党的治国方略，坚持依法治藏、富民兴藏，交通运输、网络及基础设施更加健全，教育、文化、社保、医疗、住房、体育等公共服务体系更加完善。这反映出（  ）

①西藏地区基本公共服务能力和均等化水平全面提升

②西藏的发展得益于自治区党和政府有效行使自治权

③民族平等是西藏地区经济发展和社会进步的重要保证

④西藏自治区坚持党的领导、人民当家作主、依法治国相统一

靠反冲力运动的交通工具有____ 、 ____，靠反冲力运动的动物有____ 。

    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。