物质X是一种重要的阻燃剂,工业上用三氧化二锑[Sb2O3]生产X的化学方程式为:Sb2O3+2H2O2═X+2H2O.根据质量守恒定律,推断X的化学式为( )
A:SbO2
B:H3SbO4
C:HSbO3
D:Sb2O5
I am Brad. I like scary movies and action movies. My favorite movie star is Jackie Chan. I think Jackie Chan is a great actor. He has a movie Who am I? It's a very successful action movie. It's exciting.
My name is Kelly. I am a girl. I like comedies and soap operas, but I don't like scary movies. I think they are scary. I think Beijing Opera is educational. On weekend, I often go to see it with my father. I can learn a lot about Chinese history.
I am Carlos. My favorite cartoon star is Mickey. I think Mickey Mouse is a great cartoon. I also like scary movies. I think they are very exciting.
I'm a girl. My name is Mary. On weekends, I often watch cartoons and talent shows on TV. I think they are wonderful and relaxing. I don't like sitcoms. They are boring.
根据表格内容,选择最佳答案。
选择适当的关联词。
_____生长在和平年代,_____我们不能忘记战争带来的苦痛。( )
某种商品的进价为800元,出售标价为1200元,后来由于该商品积压,商店准备打折销售,但要保证利润率不低于5%,则最多可打()
已知a:b:c=2:3:4,且2a+3b﹣2c=10,求a﹣2b+3c的值.