（1）在NaNO₃中N的化合价是　 ____　价；在NH₄Cl中N的化合价是 ____　价．

（2）请根据物质的“俗称”写出相应的化学式

大理石　 ____　、纯碱　 ____　、烧碱　 ____　、铜绿　 ____　、胆矾　 ____　、

（3）请根据物质名称写出相应的化学式

硝酸　 ____　、碳酸氢钙　 ____　、高锰酸钾　 ____　、硫酸钡　 ____　、硫酸铝　 ____　、

（4）A、B、C、D四个试剂瓶中分别盛碳酸钠、硝酸银、烧碱、稀硫酸四种稀溶液中的一种，取四种溶液各少量，依次滴入物质X的溶液和稀硝酸，发生的现象如表所示：

回答：

①物质X的化学式是　 ____　．

②物质B是 ____，加入X后反应的化学方程式是　 ____　，加稀硝酸后，沉淀消失的反应化学方程式是　 ____　．

③为进一步区别A和C，可根据置换反应的原理进行实验，写出其中一个反应的化学方程式 ____

根据首字母提示，完成短文填空。

      Wang Yaping is a Chinese spacewoman. She has made history when she was thirty-three years old—she has been China's f____ teacher in space.

      Wang taught Chinese primary and middle school students on Earth physics phenomena(现象)in space. She prepared w____ for the lecture and expressed full confidence about the lesson.

      Meeting the media, she said, “We are all s____ facing the space. We are l____ forward to encouraging our young friends to learn and research the mystical and beautiful space. ”

      Wang was born in January  1980. She is f____ east China’s Shandong Province. She was a pilot in the People's Liberation Army Air Force with experience of 1,600 h____ of flying.

      Except the space lecture, Wang w____ responsible(负责的) for monitoring (监测) the conditions of spacecraft, space experiments and operation of equipment, among others.

      Wang has served the People’s Liberation Army s____ August 1997. In May 2010, Wang became a member of the second batch of Chinese astronauts. Wang was chosen to be the member of the Shenzhou-10 space group in April 2013. She was China’s second woman astronaut who was sent into space after Liu Yang who flew with the Shenzhou-9 spacecraft.

      How great Wang Yaping is!