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l0.D【解析】由已知信息和该化合物的结构可知，元素W、X、Y、Z分别为H、B、N、Na。r(N3-)>r(Na),A项错误；工业上金属Na的冶炼是电解熔融NaCl,B项错误；H、N可形成NH4N3,C项错误。
第一节短文改错（每小题1分，共10分）We have an radio club in our school,which A started two years ago.I am lucky as I'm one of theawashost.Our club is much more than just music.Every morning we broadcast the weather,the recentlyhostsrecentnews and some special messages.During exam time,we had a special program to tell students thathavewhat they should do for preparation.In the end of the school year,many students whom are graduatingAtwhouse our club to give messages to your teachers and close friends.When parents come to our school,wetheiroften play songs sang by the students and inform them of some important events.sung
