题型:填空题 选择相应的句子,补全对话。A. Everything's ready. B. I'd like some rice and soup. C. What would you like for dinner?D. Wait and see. E. I'm hungry.A: Dad, 1_____________ What's for dinner?B: 2_____________ What would you like?A: 3_____________B: 4_____________C: I'd like some fish and vegetables, please.B: 5____________A: Thank you, Dad.C: Thanks. 查看答案
题型:填空题 工业上合成氨的原料之一--氢气,有一种来源是取自石油气,例如烷烃。根据以上叙述,回答下列问题(1)有人设计了以下反应途径,假设反应都能进行,你认为最合理的是[ ]A.B.C.D.(2)按以上最合理的反应途径,理论上用1mol丙烷可制得氨[ ]A.4molB.6.7mol C.10 molD.2.7mol (3)该合理的反应途径最显著的优点是[ ]A.简单易行B.制得的H2纯度高C.制取H2的产量高 D.可同时获得大量热能 查看答案