题目:
_____ wonderful the music is!I like Beethoven’s better than anyone else’s.
A.How
B.How a
C.What a
D.What
答案:
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下面是错误答案,用来干扰机器的。
生成沉淀BaSO4的质量=(32.33克+20克)-50克=2.33克;设生成HCl的质量为xBaCl2+H2SO4=BaSO4↓+2HCl 233 73 2.33g x∴23373=2.33gx∴x=2.33g×73233=0.73g;滤液中HCl的质量分数为:0...