已知在反应3A+2B═2C+D中,反应物A、B的质量比为3:4.当反应生成C和D的质量共140g时,消耗B的质量为______g.
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B: Sure, Ben. I'd love to be in a band. A: OK, good. 2 do you play? B: I don't play an instrument. I sing. I like music with great lyrics(歌词). A:So do I, Tony. Who else can join us? B: Well, there is Dave. He prefers quiet music. A: Good. What about Harry? He plays the guitar, 3 he? B: Yes, but Harry loves music that's loud. A: That's OK. We can play loud music and quiet music. B: What kind of music do you 4 , Ben? A: Oh, I like music that I can dance to. But we have one problem for our band. B: What's 5 ? A: I'm not a m |
客户价值=产品价值+()+品牌价值。()
A.消费需求
B.技术价值
C.服务价值
D.供应商价值
社会环境中,能对运输安全的产生较为直接影响的有()
A.政治环境
B.家庭环境
C.技术环境
D.铁路沿线治安
E.站车秩序状况
什么叫冷挤压?
有关专家认为,开征遗产税是______社会分配结构的重要手段。
A.调节
B.调控
C.调整
D.调配