【提出问题】氯化氢（HCl）气体显酸性吗？

【进行实验】该兴趣小组的同学根据二氧化碳与水反应的实验探究方法，用三朵由紫甘蓝的汁液染成蓝紫色的纸质干燥小花进行如图1的三个实验：

实验现象：Ⅰ和Ⅱ中小花不变色；Ⅲ中小花变红色。

【查阅资料】图2是同学们查阅的氯化氢气体溶于水的示意图。

【实验结论】氯化氢气体不显酸性。

【交流反思】

“一带一路”是指“丝绸之路经济带”和“21世纪海上丝绸之路”的简称。“一带一路”在提升向东开放水平的同时加快向西开放步伐。“一带一路”沿线大多是新兴经济体和发展中国家，相关很多国家或政局不稳，或社会法律机制不健全，这就增加了我国对外投资建设的政治风险；同时“一带一路”涉及国家文化差异明显，相互之间也会存在分歧与纠纷。根据材料回答下列小题。

对“一带一路”认识正确的是(    )

①有利于促进我国中西部地区和沿边地区对外开放

②在“一带一路”的建设中既要敞开国门又要维护自身安全

③形成海陆统筹、东西互济、面向全球的开放格局

④体现了我国向世界所有国家开放，实现了我国高水平开放

    The carrier rocket sent a Shenzhou-ll spacecraft（航天器）with astronauts Chen Dong and Jing  Haipeng into space. The rocket was fired from the Jiuquan Satellite Launch Center____the Gobi desert. After two days in Earth's orbit, the spacecraft____(be) to link up with China's space  laboratory, called the Tiankong-2,____name means“Heavenly Palace 2". The lab ____ (place) into orbit last month.

    The astronauts will spend 30 days on the Tiankong-2. They plan to perform ____ (science) and spacecraft-related experiments and test systems for a future space station. In____words, the Tiankong

    2 laboratory will not be part of that space station. Its main goal is to practice the techniques and the____(technology) that they will be ____(use)to build and operate that final space station.

    It is predicted that the Chinese space station will be built mostly by machine. China hopes to have the space station____ (complete) by 2022 and it is expected to operate for at least 10 years.

    China also plans to land a probe（探测器）on Mars by 2020. Until now, China has completed a total of five manned space missions. And, in 2003,it ____ (successful)landed a probe on the moon.