政府工作报告提出，2017年我国GDP目标增速为6．5%左右，低于2016年同比6．7%的目标增速。事实上我国在创造了二战后一国经济高速增长持续时间最长纪录后，正面临速度换挡节点、结构调整节点、动力转换节点，在螺旋式上升的发展历程中进入了一个新状态、新格局、新阶段，站在新的历史方位上。这表明（    ）

①一切都在变，只有变化本身是永恒的

②困难是暂时的，要对我国经济保持高速增长充满信心

③不同阶段有不同的矛盾，我国经济发展呈现新的阶段特征

④实践是检验真理性认识的唯一标准

阅读理解

    Our historic1740 Shenandoah Valley Bed and Breakfast is the perfect place to relax and enjoy the beauty and history of the Valley. Once a haven (避难所) against Indian attacks on the Virginia frontier and later Stonewall Jackson's headquarters during the Valley Campaign (战役) of 1862, our Shenandoah Valley inn(small hotel) now welcomes travelers looking for comfortable bed and board and friendly welcome.

    On Route11，the Old Valley Turnpike, only two miles from Interstate 81 at Woodstock, the inn has a country atmosphere on five private acres along the Shenandoah River. The inn offers 12 guest rooms, a well-equipped meeting room for small managing meetings, many common areas, and lovely grounds to host sendoffs and family gatherings.

    A hearty Inn at Narrow Passage breakfast will get your day off to a great start! If you have special food needs, tell us ahead of time, and we will try to have just what you need.

    “We had a wonderful four-day stay. Quiet and peaceful with the warmth of fireplaces in the room and bar to comfort and relax you. Ed and Ellen make you feel like family. Breakfast was outstanding.” A visitor said.

    After a busy day of hiking or sightseeing, return for a cool drink on the porch in summer or hot, spiced tea by the fire in winter. In the evening, walk down to the river to feed the ducks, or maybe spend a little time fishing.

    We hope you'll be able to visit us soon. We'll do all we can to make your stay a happy one.

2015年9月20日,我国新型运载火箭长征六号在太原卫星发射中心成功地将20颗微小卫星送入太空。这创造了中国航天一箭多星发射的新纪录。中国在空间技术领域开始跻身世界先进国家行列的标志是(　　)

如图表示相邻两个细胞的细胞膜接触，信息从一个细胞传递给另一个细胞。下列属于图示细胞间信息交流方式的是 (　　)。