题干
— Someone might see us.
— ___________? We are not doing anything illegal.
— ___________? We are not doing anything illegal.
A：What’s u
B：What if
C：How come
D：So what
答案(点此获取答案解析）
D
在结构上与Na2O2、FeS2、CaC2等有相似之处。Na2Sx在碱性溶液中可被NaClO氧化为Na2SO4，而NaClO被还原为NaCl，反
应中Na2Sx与NaClO的物质的量之比为1︰16，则x的值是 （ ）